Author: William Shurtleff; Akiko Aoyagi
Publisher: Soyinfo Center
ISBN: 1948436213
Category : Soybean
Languages : en
Pages : 2659
Book Description
The world's most comprehensive, well documented and well illustrated book on this subject. With extensive subject and geographical index. 318 photographs and illustrations - many in color. Free of charge in digital PDF format on Google Books.
History of Soybean Cultivation (270 BCE to 2020)
Author: William Shurtleff; Akiko Aoyagi
Publisher: Soyinfo Center
ISBN: 1948436213
Category : Soybean
Languages : en
Pages : 2659
Book Description
The world's most comprehensive, well documented and well illustrated book on this subject. With extensive subject and geographical index. 318 photographs and illustrations - many in color. Free of charge in digital PDF format on Google Books.
Publisher: Soyinfo Center
ISBN: 1948436213
Category : Soybean
Languages : en
Pages : 2659
Book Description
The world's most comprehensive, well documented and well illustrated book on this subject. With extensive subject and geographical index. 318 photographs and illustrations - many in color. Free of charge in digital PDF format on Google Books.
The Adult Learner
Author: Malcolm S. Knowles
Publisher: Routledge
ISBN: 1000072894
Category : Business & Economics
Languages : en
Pages : 407
Book Description
How do you tailor education to the learning needs of adults? Do they learn differently from children? How does their life experience inform their learning processes? These were the questions at the heart of Malcolm Knowles’ pioneering theory of andragogy which transformed education theory in the 1970s. The resulting principles of a self-directed, experiential, problem-centred approach to learning have been hugely influential and are still the basis of the learning practices we use today. Understanding these principles is the cornerstone of increasing motivation and enabling adult learners to achieve. The 9th edition of The Adult Learner has been revised to include: Updates to the book to reflect the very latest advancements in the field. The addition of two new chapters on diversity and inclusion in adult learning, and andragogy and the online adult learner. An updated supporting website. This website for the 9th edition of The Adult Learner will provide basic instructor aids including a PowerPoint presentation for each chapter. Revisions throughout to make it more readable and relevant to your practices. If you are a researcher, practitioner, or student in education, an adult learning practitioner, training manager, or involved in human resource development, this is the definitive book in adult learning you should not be without.
Publisher: Routledge
ISBN: 1000072894
Category : Business & Economics
Languages : en
Pages : 407
Book Description
How do you tailor education to the learning needs of adults? Do they learn differently from children? How does their life experience inform their learning processes? These were the questions at the heart of Malcolm Knowles’ pioneering theory of andragogy which transformed education theory in the 1970s. The resulting principles of a self-directed, experiential, problem-centred approach to learning have been hugely influential and are still the basis of the learning practices we use today. Understanding these principles is the cornerstone of increasing motivation and enabling adult learners to achieve. The 9th edition of The Adult Learner has been revised to include: Updates to the book to reflect the very latest advancements in the field. The addition of two new chapters on diversity and inclusion in adult learning, and andragogy and the online adult learner. An updated supporting website. This website for the 9th edition of The Adult Learner will provide basic instructor aids including a PowerPoint presentation for each chapter. Revisions throughout to make it more readable and relevant to your practices. If you are a researcher, practitioner, or student in education, an adult learning practitioner, training manager, or involved in human resource development, this is the definitive book in adult learning you should not be without.
Guide for the Care and Use of Laboratory Animals
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309154006
Category : Science
Languages : en
Pages : 246
Book Description
A respected resource for decades, the Guide for the Care and Use of Laboratory Animals has been updated by a committee of experts, taking into consideration input from the scientific and laboratory animal communities and the public at large. The Guide incorporates new scientific information on common laboratory animals, including aquatic species, and includes extensive references. It is organized around major components of animal use: Key concepts of animal care and use. The Guide sets the framework for the humane care and use of laboratory animals. Animal care and use program. The Guide discusses the concept of a broad Program of Animal Care and Use, including roles and responsibilities of the Institutional Official, Attending Veterinarian and the Institutional Animal Care and Use Committee. Animal environment, husbandry, and management. A chapter on this topic is now divided into sections on terrestrial and aquatic animals and provides recommendations for housing and environment, husbandry, behavioral and population management, and more. Veterinary care. The Guide discusses veterinary care and the responsibilities of the Attending Veterinarian. It includes recommendations on animal procurement and transportation, preventive medicine (including animal biosecurity), and clinical care and management. The Guide addresses distress and pain recognition and relief, and issues surrounding euthanasia. Physical plant. The Guide identifies design issues, providing construction guidelines for functional areas; considerations such as drainage, vibration and noise control, and environmental monitoring; and specialized facilities for animal housing and research needs. The Guide for the Care and Use of Laboratory Animals provides a framework for the judgments required in the management of animal facilities. This updated and expanded resource of proven value will be important to scientists and researchers, veterinarians, animal care personnel, facilities managers, institutional administrators, policy makers involved in research issues, and animal welfare advocates.
Publisher: National Academies Press
ISBN: 0309154006
Category : Science
Languages : en
Pages : 246
Book Description
A respected resource for decades, the Guide for the Care and Use of Laboratory Animals has been updated by a committee of experts, taking into consideration input from the scientific and laboratory animal communities and the public at large. The Guide incorporates new scientific information on common laboratory animals, including aquatic species, and includes extensive references. It is organized around major components of animal use: Key concepts of animal care and use. The Guide sets the framework for the humane care and use of laboratory animals. Animal care and use program. The Guide discusses the concept of a broad Program of Animal Care and Use, including roles and responsibilities of the Institutional Official, Attending Veterinarian and the Institutional Animal Care and Use Committee. Animal environment, husbandry, and management. A chapter on this topic is now divided into sections on terrestrial and aquatic animals and provides recommendations for housing and environment, husbandry, behavioral and population management, and more. Veterinary care. The Guide discusses veterinary care and the responsibilities of the Attending Veterinarian. It includes recommendations on animal procurement and transportation, preventive medicine (including animal biosecurity), and clinical care and management. The Guide addresses distress and pain recognition and relief, and issues surrounding euthanasia. Physical plant. The Guide identifies design issues, providing construction guidelines for functional areas; considerations such as drainage, vibration and noise control, and environmental monitoring; and specialized facilities for animal housing and research needs. The Guide for the Care and Use of Laboratory Animals provides a framework for the judgments required in the management of animal facilities. This updated and expanded resource of proven value will be important to scientists and researchers, veterinarians, animal care personnel, facilities managers, institutional administrators, policy makers involved in research issues, and animal welfare advocates.
Concepts of Biology
Author: Samantha Fowler
Publisher:
ISBN: 9781739015503
Category :
Languages : en
Pages : 0
Book Description
Black & white print. Concepts of Biology is designed for the typical introductory biology course for nonmajors, covering standard scope and sequence requirements. The text includes interesting applications and conveys the major themes of biology, with content that is meaningful and easy to understand. The book is designed to demonstrate biology concepts and to promote scientific literacy.
Publisher:
ISBN: 9781739015503
Category :
Languages : en
Pages : 0
Book Description
Black & white print. Concepts of Biology is designed for the typical introductory biology course for nonmajors, covering standard scope and sequence requirements. The text includes interesting applications and conveys the major themes of biology, with content that is meaningful and easy to understand. The book is designed to demonstrate biology concepts and to promote scientific literacy.
School, Family, and Community Partnerships
Author: Joyce L. Epstein
Publisher: Corwin Press
ISBN: 1483320014
Category : Education
Languages : en
Pages : 508
Book Description
Strengthen programs of family and community engagement to promote equity and increase student success! When schools, families, and communities collaborate and share responsibility for students′ education, more students succeed in school. Based on 30 years of research and fieldwork, the fourth edition of the bestseller School, Family, and Community Partnerships: Your Handbook for Action, presents tools and guidelines to help develop more effective and more equitable programs of family and community engagement. Written by a team of well-known experts, it provides a theory and framework of six types of involvement for action; up-to-date research on school, family, and community collaboration; and new materials for professional development and on-going technical assistance. Readers also will find: Examples of best practices on the six types of involvement from preschools, and elementary, middle, and high schools Checklists, templates, and evaluations to plan goal-linked partnership programs and assess progress CD-ROM with slides and notes for two presentations: A new awareness session to orient colleagues on the major components of a research-based partnership program, and a full One-Day Team Training Workshop to prepare school teams to develop their partnership programs. As a foundational text, this handbook demonstrates a proven approach to implement and sustain inclusive, goal-linked programs of partnership. It shows how a good partnership program is an essential component of good school organization and school improvement for student success. This book will help every district and all schools strengthen and continually improve their programs of family and community engagement.
Publisher: Corwin Press
ISBN: 1483320014
Category : Education
Languages : en
Pages : 508
Book Description
Strengthen programs of family and community engagement to promote equity and increase student success! When schools, families, and communities collaborate and share responsibility for students′ education, more students succeed in school. Based on 30 years of research and fieldwork, the fourth edition of the bestseller School, Family, and Community Partnerships: Your Handbook for Action, presents tools and guidelines to help develop more effective and more equitable programs of family and community engagement. Written by a team of well-known experts, it provides a theory and framework of six types of involvement for action; up-to-date research on school, family, and community collaboration; and new materials for professional development and on-going technical assistance. Readers also will find: Examples of best practices on the six types of involvement from preschools, and elementary, middle, and high schools Checklists, templates, and evaluations to plan goal-linked partnership programs and assess progress CD-ROM with slides and notes for two presentations: A new awareness session to orient colleagues on the major components of a research-based partnership program, and a full One-Day Team Training Workshop to prepare school teams to develop their partnership programs. As a foundational text, this handbook demonstrates a proven approach to implement and sustain inclusive, goal-linked programs of partnership. It shows how a good partnership program is an essential component of good school organization and school improvement for student success. This book will help every district and all schools strengthen and continually improve their programs of family and community engagement.
Poverty and Shared Prosperity 2020
Author: World Bank
Publisher: World Bank Publications
ISBN: 1464816034
Category : Business & Economics
Languages : en
Pages : 288
Book Description
This edition of the biennial Poverty and Shared Prosperity report brings sobering news. The COVID-19 (coronavirus) pandemic and its associated economic crisis, compounded by the effects of armed conflict and climate change, are reversing hard-won gains in poverty reduction and shared prosperity. The fight to end poverty has suffered its worst setback in decades after more than 20 years of progress. The goal of ending extreme poverty by 2030, already at risk before the pandemic, is now beyond reach in the absence of swift, significant, and sustained action, and the objective of advancing shared prosperity—raising the incomes of the poorest 40 percent in each country—will be much more difficult. Poverty and Shared Prosperity 2020: Reversals of Fortune presents new estimates of COVID-19's impacts on global poverty and shared prosperity. Harnessing fresh data from frontline surveys and economic simulations, it shows that pandemic-related job losses and deprivation worldwide are hitting already poor and vulnerable people hard, while also shifting the profile of global poverty to include millions of 'new poor.' Original analysis included in the report shows that the new poor are more urban, better educated, and less likely to work in agriculture than those living in extreme poverty before COVID-19. It also gives new estimates of the impact of conflict and climate change, and how they overlap. These results are important for targeting policies to safeguard lives and livelihoods. It shows how some countries are acting to reverse the crisis, protect those most vulnerable, and promote a resilient recovery. These findings call for urgent action. If the global response fails the world's poorest and most vulnerable people now, the losses they have experienced to date will be minimal compared with what lies ahead. Success over the long term will require much more than stopping COVID-19. As efforts to curb the disease and its economic fallout intensify, the interrupted development agenda in low- and middle-income countries must be put back on track. Recovering from today's reversals of fortune requires tackling the economic crisis unleashed by COVID-19 with a commitment proportional to the crisis itself. In doing so, countries can also plant the seeds for dealing with the long-term development challenges of promoting inclusive growth, capital accumulation, and risk prevention—particularly the risks of conflict and climate change.
Publisher: World Bank Publications
ISBN: 1464816034
Category : Business & Economics
Languages : en
Pages : 288
Book Description
This edition of the biennial Poverty and Shared Prosperity report brings sobering news. The COVID-19 (coronavirus) pandemic and its associated economic crisis, compounded by the effects of armed conflict and climate change, are reversing hard-won gains in poverty reduction and shared prosperity. The fight to end poverty has suffered its worst setback in decades after more than 20 years of progress. The goal of ending extreme poverty by 2030, already at risk before the pandemic, is now beyond reach in the absence of swift, significant, and sustained action, and the objective of advancing shared prosperity—raising the incomes of the poorest 40 percent in each country—will be much more difficult. Poverty and Shared Prosperity 2020: Reversals of Fortune presents new estimates of COVID-19's impacts on global poverty and shared prosperity. Harnessing fresh data from frontline surveys and economic simulations, it shows that pandemic-related job losses and deprivation worldwide are hitting already poor and vulnerable people hard, while also shifting the profile of global poverty to include millions of 'new poor.' Original analysis included in the report shows that the new poor are more urban, better educated, and less likely to work in agriculture than those living in extreme poverty before COVID-19. It also gives new estimates of the impact of conflict and climate change, and how they overlap. These results are important for targeting policies to safeguard lives and livelihoods. It shows how some countries are acting to reverse the crisis, protect those most vulnerable, and promote a resilient recovery. These findings call for urgent action. If the global response fails the world's poorest and most vulnerable people now, the losses they have experienced to date will be minimal compared with what lies ahead. Success over the long term will require much more than stopping COVID-19. As efforts to curb the disease and its economic fallout intensify, the interrupted development agenda in low- and middle-income countries must be put back on track. Recovering from today's reversals of fortune requires tackling the economic crisis unleashed by COVID-19 with a commitment proportional to the crisis itself. In doing so, countries can also plant the seeds for dealing with the long-term development challenges of promoting inclusive growth, capital accumulation, and risk prevention—particularly the risks of conflict and climate change.
How to Make a Plant Love You
Author: Summer Rayne Oakes
Publisher: Penguin
ISBN: 0525540296
Category : Gardening
Languages : en
Pages : 210
Book Description
Summer Rayne Oakes, an urban houseplant expert and environmental scientist, is the icon of wellness-minded millennials who want to bring nature indoors, according to a New York Times profile. Summer has managed to grow 1,000 houseplants in her Brooklyn apartment (and they're thriving!) Her secret? She approaches her relationships with plants as intentionally as if they were people. Everyone deserves to feel the inner peace that comes from taking care of greenery. Beyond the obvious benefits--beauty and cleaner air--there's a strong psychological benefit to nurturing plants as a path to mindfulness. They can reduce our stress level, lower our blood pressure, and improve our overall outlook. And they offer a rare opportunity to find joy by caring for another living being. When Summer Rayne Oakes moved to Brooklyn from the Pennsylvania countryside, she knew that bringing nature indoors was her only chance to stay sane. She found them by the side of the road, in long-forgotten window boxes, at farmers' markets, and in local garden shops. She found ways to shelve, hang, tuck, anchor, secure, and suspend them. She even installed a 150-foot expandable hose that connects to pipes under her kitchen sink, so she only has to spend about a half-hour a day tending to her plants--an activity that she describes as a "moving meditation." This is Summer's guidebook for cultivating an entirely new relationship with your plant children. Inside, you'll learn to: Pause for the flowers and greenery all around you, even the ones sprouting bravely between cracked pavement Trust that your apartment jungle offers you far more than pretty décor See the world from a plant's perspective, trading modern consumerism for sustainability Serve your chlorophyllic friends by learning to identify the right species for your home and to recreate their natural habitat (Bonus: your indoor garden won't die!) When we become plant parents, we also become better caretakers of ourselves, the people around us, and our planet. So, let's step inside the world of plants and discover how we can begin cultivating our own personal green space--in our homes, in our minds, and in our hearts.
Publisher: Penguin
ISBN: 0525540296
Category : Gardening
Languages : en
Pages : 210
Book Description
Summer Rayne Oakes, an urban houseplant expert and environmental scientist, is the icon of wellness-minded millennials who want to bring nature indoors, according to a New York Times profile. Summer has managed to grow 1,000 houseplants in her Brooklyn apartment (and they're thriving!) Her secret? She approaches her relationships with plants as intentionally as if they were people. Everyone deserves to feel the inner peace that comes from taking care of greenery. Beyond the obvious benefits--beauty and cleaner air--there's a strong psychological benefit to nurturing plants as a path to mindfulness. They can reduce our stress level, lower our blood pressure, and improve our overall outlook. And they offer a rare opportunity to find joy by caring for another living being. When Summer Rayne Oakes moved to Brooklyn from the Pennsylvania countryside, she knew that bringing nature indoors was her only chance to stay sane. She found them by the side of the road, in long-forgotten window boxes, at farmers' markets, and in local garden shops. She found ways to shelve, hang, tuck, anchor, secure, and suspend them. She even installed a 150-foot expandable hose that connects to pipes under her kitchen sink, so she only has to spend about a half-hour a day tending to her plants--an activity that she describes as a "moving meditation." This is Summer's guidebook for cultivating an entirely new relationship with your plant children. Inside, you'll learn to: Pause for the flowers and greenery all around you, even the ones sprouting bravely between cracked pavement Trust that your apartment jungle offers you far more than pretty décor See the world from a plant's perspective, trading modern consumerism for sustainability Serve your chlorophyllic friends by learning to identify the right species for your home and to recreate their natural habitat (Bonus: your indoor garden won't die!) When we become plant parents, we also become better caretakers of ourselves, the people around us, and our planet. So, let's step inside the world of plants and discover how we can begin cultivating our own personal green space--in our homes, in our minds, and in our hearts.
MITRE Systems Engineering Guide
Red Rising
Author: Pierce Brown
Publisher: Del Rey
ISBN: 0345539796
Category : Fiction
Languages : en
Pages : 414
Book Description
NEW YORK TIMES BESTSELLER • Pierce Brown’s relentlessly entertaining debut channels the excitement of The Hunger Games by Suzanne Collins and Ender’s Game by Orson Scott Card. “Red Rising ascends above a crowded dystopian field.”—USA Today ONE OF THE BEST BOOKS OF THE YEAR—Entertainment Weekly, BuzzFeed, Shelf Awareness “I live for the dream that my children will be born free,” she says. “That they will be what they like. That they will own the land their father gave them.” “I live for you,” I say sadly. Eo kisses my cheek. “Then you must live for more.” Darrow is a Red, a member of the lowest caste in the color-coded society of the future. Like his fellow Reds, he works all day, believing that he and his people are making the surface of Mars livable for future generations. Yet he toils willingly, trusting that his blood and sweat will one day result in a better world for his children. But Darrow and his kind have been betrayed. Soon he discovers that humanity reached the surface generations ago. Vast cities and lush wilds spread across the planet. Darrow—and Reds like him—are nothing more than slaves to a decadent ruling class. Inspired by a longing for justice, and driven by the memory of lost love, Darrow sacrifices everything to infiltrate the legendary Institute, a proving ground for the dominant Gold caste, where the next generation of humanity’s overlords struggle for power. He will be forced to compete for his life and the very future of civilization against the best and most brutal of Society’s ruling class. There, he will stop at nothing to bring down his enemies . . . even if it means he has to become one of them to do so. Praise for Red Rising “[A] spectacular adventure . . . one heart-pounding ride . . . Pierce Brown’s dizzyingly good debut novel evokes The Hunger Games, Lord of the Flies, and Ender’s Game. . . . [Red Rising] has everything it needs to become meteoric.”—Entertainment Weekly “Ender, Katniss, and now Darrow.”—Scott Sigler “Red Rising is a sophisticated vision. . . . Brown will find a devoted audience.”—Richmond Times-Dispatch Don’t miss any of Pierce Brown’s Red Rising Saga: RED RISING • GOLDEN SON • MORNING STAR • IRON GOLD • DARK AGE • LIGHT BRINGER
Publisher: Del Rey
ISBN: 0345539796
Category : Fiction
Languages : en
Pages : 414
Book Description
NEW YORK TIMES BESTSELLER • Pierce Brown’s relentlessly entertaining debut channels the excitement of The Hunger Games by Suzanne Collins and Ender’s Game by Orson Scott Card. “Red Rising ascends above a crowded dystopian field.”—USA Today ONE OF THE BEST BOOKS OF THE YEAR—Entertainment Weekly, BuzzFeed, Shelf Awareness “I live for the dream that my children will be born free,” she says. “That they will be what they like. That they will own the land their father gave them.” “I live for you,” I say sadly. Eo kisses my cheek. “Then you must live for more.” Darrow is a Red, a member of the lowest caste in the color-coded society of the future. Like his fellow Reds, he works all day, believing that he and his people are making the surface of Mars livable for future generations. Yet he toils willingly, trusting that his blood and sweat will one day result in a better world for his children. But Darrow and his kind have been betrayed. Soon he discovers that humanity reached the surface generations ago. Vast cities and lush wilds spread across the planet. Darrow—and Reds like him—are nothing more than slaves to a decadent ruling class. Inspired by a longing for justice, and driven by the memory of lost love, Darrow sacrifices everything to infiltrate the legendary Institute, a proving ground for the dominant Gold caste, where the next generation of humanity’s overlords struggle for power. He will be forced to compete for his life and the very future of civilization against the best and most brutal of Society’s ruling class. There, he will stop at nothing to bring down his enemies . . . even if it means he has to become one of them to do so. Praise for Red Rising “[A] spectacular adventure . . . one heart-pounding ride . . . Pierce Brown’s dizzyingly good debut novel evokes The Hunger Games, Lord of the Flies, and Ender’s Game. . . . [Red Rising] has everything it needs to become meteoric.”—Entertainment Weekly “Ender, Katniss, and now Darrow.”—Scott Sigler “Red Rising is a sophisticated vision. . . . Brown will find a devoted audience.”—Richmond Times-Dispatch Don’t miss any of Pierce Brown’s Red Rising Saga: RED RISING • GOLDEN SON • MORNING STAR • IRON GOLD • DARK AGE • LIGHT BRINGER
Transportation Planning Handbook
Author: ITE (Institute of Transportation Engineers)
Publisher: John Wiley & Sons
ISBN: 1118762355
Category : Technology & Engineering
Languages : en
Pages : 1204
Book Description
A multi-disciplinary approach to transportation planning fundamentals The Transportation Planning Handbook is a comprehensive, practice-oriented reference that presents the fundamental concepts of transportation planning alongside proven techniques. This new fourth edition is more strongly focused on serving the needs of all users, the role of safety in the planning process, and transportation planning in the context of societal concerns, including the development of more sustainable transportation solutions. The content structure has been redesigned with a new format that promotes a more functionally driven multimodal approach to planning, design, and implementation, including guidance toward the latest tools and technology. The material has been updated to reflect the latest changes to major transportation resources such as the HCM, MUTCD, HSM, and more, including the most current ADA accessibility regulations. Transportation planning has historically followed the rational planning model of defining objectives, identifying problems, generating and evaluating alternatives, and developing plans. Planners are increasingly expected to adopt a more multi-disciplinary approach, especially in light of the rising importance of sustainability and environmental concerns. This book presents the fundamentals of transportation planning in a multidisciplinary context, giving readers a practical reference for day-to-day answers. Serve the needs of all users Incorporate safety into the planning process Examine the latest transportation planning software packages Get up to date on the latest standards, recommendations, and codes Developed by The Institute of Transportation Engineers, this book is the culmination of over seventy years of transportation planning solutions, fully updated to reflect the needs of a changing society. For a comprehensive guide with practical answers, The Transportation Planning Handbook is an essential reference.
Publisher: John Wiley & Sons
ISBN: 1118762355
Category : Technology & Engineering
Languages : en
Pages : 1204
Book Description
A multi-disciplinary approach to transportation planning fundamentals The Transportation Planning Handbook is a comprehensive, practice-oriented reference that presents the fundamental concepts of transportation planning alongside proven techniques. This new fourth edition is more strongly focused on serving the needs of all users, the role of safety in the planning process, and transportation planning in the context of societal concerns, including the development of more sustainable transportation solutions. The content structure has been redesigned with a new format that promotes a more functionally driven multimodal approach to planning, design, and implementation, including guidance toward the latest tools and technology. The material has been updated to reflect the latest changes to major transportation resources such as the HCM, MUTCD, HSM, and more, including the most current ADA accessibility regulations. Transportation planning has historically followed the rational planning model of defining objectives, identifying problems, generating and evaluating alternatives, and developing plans. Planners are increasingly expected to adopt a more multi-disciplinary approach, especially in light of the rising importance of sustainability and environmental concerns. This book presents the fundamentals of transportation planning in a multidisciplinary context, giving readers a practical reference for day-to-day answers. Serve the needs of all users Incorporate safety into the planning process Examine the latest transportation planning software packages Get up to date on the latest standards, recommendations, and codes Developed by The Institute of Transportation Engineers, this book is the culmination of over seventy years of transportation planning solutions, fully updated to reflect the needs of a changing society. For a comprehensive guide with practical answers, The Transportation Planning Handbook is an essential reference.