Sign-In
Cart
Optics and Laser Spectroscopy, Bell Telephone Laboratories, 1951-1961, and Stanford University Since 1961: Oral History Transcript / 199
Hardcover
General EducationGeneral World History
ISBN13: 9781018565811
Publisher: Legare Street Pr
Published: Oct 27 2022
Pages: 446
Weight: 1.76
Height: 1.00 Width: 6.14 Depth: 9.21
Language: English
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.
This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.
Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
1 different editions
Also available
Optics and Laser Spectroscopy, Bell Telephone Laboratories, 1951-1961, and Stanford University Since 1961: Oral History Transcript / 199
Schawlow, Arthur L.
Stoicheff, B. P.
Riess, Suzanne B.
Paperback
Also from
Riess, Suzanne B.
Harold E. Jones and Mary C. Jones, Partners in Longitudinal Studies: Transcript, 1981-1982
Hilgard, Ernest Ropiequet
Riess, Suzanne B.
Jones, Mary Cover
Paperback
Master Teacher of Cellists, and Humble Student of Nature: Oral History Transcript / and Related Material, 1982-198
Rowell, Margaret Avery
Sharp, Irene
Riess, Suzanne B.
Paperback
Anthropology and a Lifetime of Observation: Oral History Transcript / 200
Riess, Suzanne B.
Colson, Elizabeth
Hardcover
Artist, and Wildlife and Environmental Defender: Oral History Transcript
Riess, Suzanne B.
Lage, Ann
Owings, Margaret Wentworth Ive
Hardcover
Master Teacher of Cellists, and Humble Student of Nature: Oral History Transcript / and Related Material, 1982-198
Rowell, Margaret Avery
Sharp, Irene
Riess, Suzanne B.
Hardcover
Artist, and Wildlife and Environmental Defender: Oral History Transcript
Riess, Suzanne B.
Lage, Ann
Owings, Margaret Wentworth Ive
Paperback
Continuing Memoirs: Family, Community, University: Oral History Transcript / 1972-197
Goodin, Marian Sproul
Riess, Suzanne B.
Hagar, Ella Barrows
Paperback
The Invisible man, or Public Ceremonies Chairman at Berkeley for Thirty-five Years: Oral History Transcript / and Related Material, 1980-198
Bowker, Albert Hosmer
Riess, Suzanne B.
Wilson, Garff B. Ive
Paperback
A Newspaper Editor's Voyage Across San Francisco Bay
Newhall, Scott
Riess, Suzanne B.
Kortum, Karl
Paperback
California Native Plantsman: UC Berkeley Botanical Garden, Tilden Botanic Garden: Oral History Transcript
Roderick, Wayne
Riess, Suzanne B.
Paperback
California Native Plants Nurserywoman, Civil Rights Activist, and Humanitarian: Oral History Transcript / 199
Isenberg, Gerda
O'Brien, Bart C.
Riess, Suzanne B.
Hardcover
California Native Plantsman: UC Berkeley Botanical Garden, Tilden Botanic Garden: Oral History Transcript
Riess, Suzanne B.
Roderick, Wayne
Hardcover
A Japanese-American Nurseryman's Life in California: Floriculture and Family, 1883-1992: Oral History Transcript / 199
Riess, Suzanne B.
Domoto, Toichi 1902- Ive
Nuccio, Julius
Paperback
A Life in Physics: Bell Telephone Laboratories and World War II, Columbia University and the Laser, MIT and Government Service, Californi
Townes, Charles H. Ive
Schawlow, Arthur L.
Riess, Suzanne B.
Paperback
Landscape Architecture: The Profession in California, 1935-1940, and Telesis: Oral History Transcript / 199
Eckbo, Garrett Ive
Royston, Robert N.
Riess, Suzanne B.
Paperback
Conversations With Elmer Bischoff: Oral History Transcript. 199
Bischoff, Elmer
Karlstrom, Paul J.
Riess, Suzanne B.
Hardcover
Sketches of an Improbable Ninety Years: Oral History Transcript / 1973-197
Riess, Suzanne B.
Besig, Ernest
Salz, Helen A.
Hardcover
California Native Plants Nurserywoman, Civil Rights Activist, and Humanitarian: Oral History Transcript / 199
Isenberg, Gerda
O'Brien, Bart C.
Riess, Suzanne B.
Paperback
Finding the Themes: Oral History Transcript: Family, Anthropology, Language Origins, Peace and Conflict / 200
Foster, Mary Lecron
Riess, Suzanne B.
Paperback
An eye on the World: Oral History Transcript: Reviewing a Lifetime in Photography / 200
Miller, Wayne
Riess, Suzanne B.
Hardcover
A Journalist From India, at Home in the World: Oral History Transcript / 198
Riess, Suzanne B.
Lal, Gobind Behari Ive
Hearst, William Randolph
Hardcover
Landscape Architecture: The Profession in California, 1935-1940, and Telesis: Oral History Transcript / 199
Royston, Robert N.
Riess, Suzanne B.
Eckbo, Garrett Ive
Hardcover
Women's News Editor: Vallejo Times-Herald, 1931-1978: Oral History Transcript / 199
Leary, Mary Ellen
Devlin, Marion Erb
Riess, Suzanne B.
Hardcover
Activities in a Troubled World: War Relief, Banking and Business: Oral History Transcript / and Related Material, 1978
Riess, Suzanne B.
Simpson, John L. 1891-1981 Ive
Paperback
Family and Berkeley Memories, and the Study and Profession of Asian Art: Oral History Transcript / 199
Milford-Lutzker, Mary-Ann
Riess, Suzanne B.
Field, Katherine Ive
Paperback
A Journalist From India, at Home in the World: Oral History Transcript / 198
Hearst, William Randolph
Riess, Suzanne B.
Lal, Gobind Behari Ive
Paperback
A Native Daughter's Leadership in Education, College of Notre Dame, Belmont, California, 1956-1980: Oral History Transcript / and Related Material, 19
Cousins, Norman
Riess, Suzanne B.
Cunningham, Catharine Julie Ive
Paperback
A Newspaper Editor's Voyage Across San Francisco Bay
Newhall, Scott
Riess, Suzanne B.
Kortum, Karl
Hardcover
A Social Anthropologist in Britain and Berkeley: Oral History Transcript / 200
Benedict, Burton Ive
Riess, Suzanne B.
Hardcover
Memories of Girlhood and the University: Oral History Transcript / And Related Material, 197
Riess, Suzanne B.
Stewart, Jessie Harris
Paperback
Pacific Coast Nurseryman, Award-Winning Horticulturalist, and Historian: Oral History Transcript / 199
Riess, Suzanne B.
Guerzon, Angel
Carman, Edward S. 1922- Ive
Paperback
Optics and Laser Spectroscopy, Bell Telephone Laboratories, 1951-1961, and Stanford University Since 1961: Oral History Transcript / 199
Schawlow, Arthur L.
Stoicheff, B. P.
Riess, Suzanne B.
Paperback
Recollections and Reminiscences of Life in the Bay Area From 1920 Onward: Oral History Transcript / and Related Material, 1964-196
Lehman, B. H. 1889-1977 Ive
Parkinson, Thomas Francis
Riess, Suzanne B.
Paperback
Florence Treadwell, and Berkeley: Oral History Transcript / and Related Material, 1973-197
Riess, Suzanne B.
Boynton, Judd Ive
Paperback
Women's News Editor: Vallejo Times-Herald, 1931-1978: Oral History Transcript / 199
Leary, Mary Ellen
Devlin, Marion Erb
Riess, Suzanne B.
Paperback
A Portrait Photographer's View of the University of California, Berkeley, 1947-1981: Oral History Transcript / and Related Material, 1981-198
Riess, Suzanne B.
Bishop, G. Paul Ive
Hardcover
Anthropology and a Lifetime of Observation: Oral History Transcript / 200
Riess, Suzanne B.
Colson, Elizabeth
Paperback
Geraldine Knight Scott, 1904-1989, a Woman in Landscape Architecture in California, 1926-1989: Oral History Transcript / 1976-1988
Scott, Geraldine Knight
Buktenica, Jack
Riess, Suzanne B.
Hardcover
Anneberg Gallery, 1966-1981, and Craft and Folk art in the San Francisco Bay Area: Oral History Transcript / 199
Anneberg, Margery
Larsen, Jack Lenor
Riess, Suzanne B.
Hardcover
A Portrait Photographer's View of the University of California, Berkeley, 1947-1981: Oral History Transcript / and Related Material, 1981-198
Riess, Suzanne B.
Bishop, G. Paul Ive
Paperback
A Japanese-American Nurseryman's Life in California: Floriculture and Family, 1883-1992: Oral History Transcript / 199
Domoto, Toichi 1902- Ive
Nuccio, Julius
Riess, Suzanne B.
Hardcover
Florence Treadwell, and Berkeley: Oral History Transcript / and Related Material, 1973-197
Riess, Suzanne B.
Boynton, Judd Ive
Hardcover
Sketches of an Improbable Ninety Years: Oral History Transcript / 1973-197
Besig, Ernest
Salz, Helen A.
Riess, Suzanne B.
Paperback
Fine Arts and Family: Oral History Transcript: the San Francisco Museum of Modern Art, Philanthropy, Writing, and Haas Family Memories / 199
Trefethen, Eugene E. 1909-
Riess, Suzanne B.
Haas, Evelyn Danzig
Hardcover
Fine Arts and Family: Oral History Transcript: the San Francisco Museum of Modern Art, Philanthropy, Writing, and Haas Family Memories / 199
Haas, Evelyn Danzig
Trefethen, Eugene E. 1909-
Riess, Suzanne B.
Paperback
An eye on the World: Oral History Transcript: Reviewing a Lifetime in Photography / 200
Riess, Suzanne B.
Miller, Wayne
Paperback
Geraldine Knight Scott, 1904-1989, a Woman in Landscape Architecture in California, 1926-1989: Oral History Transcript / 1976-1988
Buktenica, Jack
Riess, Suzanne B.
Scott, Geraldine Knight
Hardcover
A Life in Architecture: Indian Dancing, Migrant Housing, Telesis, Design for Urban Living, Theater, Teaching: Oral History Transcrip
Demars, Vernon Armand
Kent, T. J.
Riess, Suzanne B.
Paperback
Lawyers, Inc.: Partners in Plant Pathology, Horticulture, and Marriage: Oral History Transcript / 199
Lawyer, Lewis
Riess, Suzanne B.
Lawyer, Adele
Hardcover
A Life in Architecture: Indian Dancing, Migrant Housing, Telesis, Design for Urban Living, Theater, Teaching: Oral History Transcrip
Demars, Vernon Armand
Kent, T. J.
Riess, Suzanne B.
Hardcover
Anneberg Gallery, 1966-1981, and Craft and Folk art in the San Francisco Bay Area: Oral History Transcript / 199
Riess, Suzanne B.
Anneberg, Margery
Larsen, Jack Lenor
Paperback
Lawyers, Inc.: Partners in Plant Pathology, Horticulture, and Marriage: Oral History Transcript / 199
Lawyer, Adele
Lawyer, Lewis
Riess, Suzanne B.
Paperback
Anthropology and a Lifetime of Observation: Oral History Transcript / 200
Colson, Elizabeth
Riess, Suzanne B.
Paperback
A Life in Physics: Bell Telephone Laboratories and World War II, Columbia University and the Laser, MIT and Government Service, Californi
Townes, Charles H. Ive
Schawlow, Arthur L.
Riess, Suzanne B.
Hardcover
Geraldine Knight Scott, 1904-1989, a Woman in Landscape Architecture in California, 1926-1989: Oral History Transcript / 1976-1988
Scott, Geraldine Knight
Buktenica, Jack
Riess, Suzanne B.
Paperback
An Anthropologist's Life in the Twentieth Century: Oral History Transcript: Theory and Practice at UC Berkeley, the Smithsonian, in Mexico, and With t
Foster, George McClelland
Riess, Suzanne B.
Hardcover
A Native Daughter's Leadership in Education, College of Notre Dame, Belmont, California, 1956-1980: Oral History Transcript / and Related Material, 19
Cousins, Norman
Riess, Suzanne B.
Cunningham, Catharine Julie Ive
Hardcover
Finding the Themes: Oral History Transcript: Family, Anthropology, Language Origins, Peace and Conflict / 200
Foster, Mary Lecron
Riess, Suzanne B.
Hardcover
English Garden History, Western Gardening, and Creating and Editing Pacific Horticulture: Oral History Transcript / 2000
Riess, Suzanne B.
Waters, W. George Ive
Hardcover
Solving Visual Problems: Oral History Transcript: an Artist's Life / 200
Riess, Suzanne B.
Galli, Stanley Ive
Hardcover
The Making of a Documentary Photographer: Oral History Transcript / and Related Material, 1960-196
Riess, Suzanne B.
Lange, Dorothea Ive
Hardcover
A California Heritage: The Bowles Collection of 18th-century English Porcelain: Oral History Transcript / 199
Riess, Suzanne B.
Bowles, Constance Crowley
Hardcover
The Invisible man, or Public Ceremonies Chairman at Berkeley for Thirty-five Years: Oral History Transcript / and Related Material, 1980-198
Riess, Suzanne B.
Bowker, Albert Hosmer
Wilson, Garff B. Ive
Hardcover
Conversations With Elmer Bischoff: Oral History Transcript. 199
Bischoff, Elmer
Karlstrom, Paul J.
Riess, Suzanne B.
Paperback
Also in
General Education
A Light in Dark Times: The New School for Social Research and Its University in Exile
Friedlander, Judith
Paperback
How to Educate a Citizen: The Power of Shared Knowledge to Unify a Nation
Hirsch, E. D., Jr.
Hardcover
The College Scam: How America's Universities Are Bankrupting and Brainwashing Away the Future of America's Youth
Kirk, Charlie
Hardcover
Homeschooled: A New York Times Bestselling Memoir and Read with Jenna Pick
Merrill Block, Stefan
Hardcover
7-Figure Educator: Turn Your Experience as an Educator Into Income, Impact, and Freedom
Jordan-Thomas, Erica
Paperback
Light Up the Learning Brain: 7 Keys to Reducing Disruptive Behavior in the Classroom
Sinarski, Jessica
Paperback
Loteria: First Words / Primeras Palabras (Bilingual: English/Spanish): A Bilingual Picture Book
Rodriguez, Patty
Stein, Ariana
Hardcover
Teach Like a Champion 3.0: 63 Techniques That Put Students on the Path to College
Lemov, Doug
Paperback
The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness
Ramsey, Dave
Hardcover
Math Fact Fluency: 60+ Games and Assessment Tools to Support Learning and Retention
Bay-Williams, Jennifer
Kling, Gina
Paperback
The College Finder: Your comprehensive guide to finding colleges that fit YOUR unique path
Antonoff, Steven R.
McCann M. S., Jay
Paperback
Poisoned Ivies: The Inside Account of the Academic and Moral Rot at America's Elite Universities
Stefanik, Elise
Hardcover
The Neurodivergent Learner: A New Approach to Your Child's Success in the Classroom and Beyond
King, Emily W., PhD
Hardcover
Miracle Children: Race, Education, and a True Story of False Promises
Benner, Katie
Green, Erica L.
Hardcover
The Kids Who Aren't Okay: The Urgent Case for Reimagining Support, Belonging, and Hope in Schools
Greene, Ross W.
Hardcover
The Joy of Money: How to Do More with and Feel Better about Your Money--No Matter How Much You Have
Grimes, Carrie Joy
Hardcover
The Best 392 Colleges, 2027: In-Depth Profiles & Ranking Lists to Help Find the Right College for You
Franek, Robert
Soto, David
The Princeton Review
Paperback
The Digital Delusion: How Classroom Technology Harms Our Kids' Learning--And How to Help Them Thrive Again; Updated Edition
Cooney Horvath, Jared, PhD Med
Paperback
The People's Guide to College Applications: A Week-By-Week Approach to Writing, Connecting, and Getting in
Constantino, Jill
Paperback
Why You Should Read Children's Books, Even Though You Are So Old and Wise
Rundell, Katherine
Hardcover
The Power of the Socratic Classroom: Students. Questions. Dialogue. Learning.
Fischer, Charles Ames
Paperback
Lies My Teacher Told Me: Everything Your American History Textbook Got Wrong
Loewen, James W.
Paperback
Scholastic Success with Reading Comprehension Grade 2 Workbook
Scholastic Teaching Resources
Paperback
The Station Rotation Model & UDL: Elevate Tier 1 Instruction and Cultivate Learner Agency
Tucker, Catlin R.
Paperback
Scholastic Success with Reading Comprehension Grade 4 Workbook
Scholastic Teaching Resources
Paperback
Financial Feminist: Overcome the Patriarchy's Bullsh*t to Master Your Money and Build a Life You Love
Dunlap, Tori
Hardcover
One Trusted Adult: How to Build Strong Connections & Healthy Boundaries with Young People
Raney Edd, Brooklyn
Paperback
Permission to Feel: The Power of Emotional Intelligence to Achieve Well-Being and Success
Brackett, Marc
Paperback
What's So Great about the Great Books?: Why You Should Read Classic Literature (Even Though It Might Destroy You)
Kanakia, Naomi
Hardcover
Scholastic Success with Reading Comprehension Grade 3 Workbook
Scholastic Teaching Resources
Paperback
Better Than Carrots or Sticks: Restorative Practices for Positive Classroom Management
Frey, Nancy
Smith, Dominique
Fisher, Douglas
Paperback
First Little Readers Parent Pack: Guided Reading Level a: 25 Irresistible Books That Are Just the Right Level for Beginning Readers
Charlesworth, Liza
Schecter, Deborah
Paperback
The Addiction Recovery Workbook: Powerful Skills for Preventing Relapse Every Day
Freedman, Paula A.
Paperback
Beyond the Science of Reading: Connecting Literacy Instruction to the Science of Learning
Wexler, Natalie
Paperback
Original Sins: The (Mis)Education of Black and Native Children and the Construction of American Racism
Ewing, Eve L.
Paperback
How to Take Smart Notes: One Simple Technique to Boost Writing, Learning and Thinking
Ahrens, Sönke
Paperback
Setting Limits in the Classroom, 3rd Edition: A Complete Guide to Effective Classroom Management with a School-Wide Disciplineplan
Stanzione, Lisa
MacKenzie, Robert J.
Paperback
Universal Design for Learning: Principles, Framework, and Practice
Rose, David H.
Meyer, Anne
Paperback
Culturally Responsive Teaching and the Brain: Promoting Authentic Engagement and Rigor Among Culturally and Linguistically Diverse Students
Hammond, Zaretta L.
Paperback
Illuminating Care: The Pedagogy and Practice of Care in Early Childhood Communities
Garboden Murray, Carol
Paperback
The Writing Revolution 2.0: A Guide to Advancing Thinking Through Writing in All Subjects and Grades
Wexler, Natalie
Hochman, Judith C.
Paperback
Supporting Student Executive Functions: Insights and Strategies for Educators
Carey, Lisa
Reid, Alexis
Paperback
AI with Intention: Principles and Action Steps for Teachers and School Leaders
Frontier, Tony
Paperback
Mtss for Reading Improvement: A Leader's Tool Kit for Schoolwide Success (Reading Science in Action: An Mtss Tool Kit)
Brown, Sarah
Stollar, Stephanie
Paperback
The Naked Roommate: And 107 Other Issues You Might Run Into in College (Revised and Updated)
Cohen, Harlan
Paperback
The Fallacy Detective: Thirty-Eight Lessons on How to Recognize Bad Reasoning
Bluedorn, Nathaniel
Bluedorn, Hans
Paperback
Reading Assessment Done Right: Tools and Techniques for Data-Driven Instruction
Stollar, Stephanie
Winn, Kate
Paperback
Scholastic Success with Reading Comprehension Grade 5 Workbook
Scholastic Teaching Resources
Paperback
Math Practice Workbook Grades 6-8: 1000+ Questions You Need to Kill in Middle School by Brain Hunter Prep
Brain Hunter Prep
Paperback
MANUAL SUPERANDO PÉRDIDAS EMOCIONALES, vigésimo aniversario, edición extendida: programa de acción para superar la muerte, el divorcio y otras pérdida
James, John W.
Friedman, Russell
Paperback
The Preparation: How To Become Competent, Confident, and Dangerous
Smith, Matt
Smith, Maxim
Casey, Doug
Hardcover
Hacking School Discipline: 9 Ways to Create a Culture of Empathy and Responsibility Using Restorative Justice
Maynard, Nathan
Weinstein, Brad
Paperback
The Golden Thread: A History of the Western Tradition, Volume I: The Ancient World and Christendom
Hankins, James
Guelzo, Allen C.
Hardcover
The Essentials of Adolescent Literacy: Integrating Evidence-Based Reading and Writing Instruction in Grades 5-12
Sedita, Joan
Paperback
The Inspired Homeschool: How History's Heroes Light a Path Toward Joyful, Confident Learning
Pepito, Jennifer
Hardcover
The Resistance Solution: Why Educators Resist Change and What They Need Instead
Silver, Becca
Paperback
Teaching with Dignity: How to Create Classroom Ecosystems Where People Thrive
Snyder, Summer
Krownapple, John
Cobb, Floyd
Paperback
Fostering Resilient Learners: Strategies for Creating a Trauma-Sensitive Classroom
Souers, Kristin
Hall, Pete
Paperback
Unearthing Joy: A Guide to Culturally and Historically Responsive Curriculum and Instruction
Muhammad, Gholdy
Paperback
The Opposite of Cheating: Teaching for Integrity in the Age of AI Volume 4
Rettinger, David A.
Bertram Gallant, Tricia
Paperback
Your Students, My Students, Our Students: Rethinking Equitable and Inclusive Classrooms
Fisher, Douglas
Jung, Lee Ann
Frey, Nancy
Paperback
The Essential Homeschool Kindergarten Workbook: 135 Fun Curriculum-Based Activities to Build Reading, Writing, and Math Skills!
Lewallen, Hayley
Paperback
Creating a Language-Rich Math Class: Strategies and Activities for Building Conceptual Understanding
Atkins, Sandra L.
Paperback
Thriving with ADHD Workbook for Kids: 60 Fun Activities to Help Children Self-Regulate, Focus, and Succeed
Miller, Kelli, Lcsw MSW
Paperback
Enhancing Professional Practice: The Framework for Teaching
Kappes, Lee
Danielson, Charlotte
Furman, Jim S.
Paperback
Handwriting Practice Book for Kids Ages 6-8: Printing workbook for Grades 1, 2 & 3, Learn to Trace Alphabet Letters and Numbers 1-100, Sight Words, 10
Hippidoo
Lalgudi, Sujatha
Paperback
Learn to Read Activity Book: 101 Fun Phonics Lessons to Teach Your Child to Read
Braun, Hannah, M. Ed
Paperback
CompTIA Tech+ Certification All-in-One Exam Guide, Third Edition (Exam FC0-U71)
Wempen, Faithe
Paperback
First Little Readers Parent Pack: Guided Reading Level B: 25 Irresistible Books That Are Just the Right Level for Beginning Readers
Charlesworth, Liza
Schecter, Deborah
Paperback
The Preparation: How To Become Competent, Confident, and Dangerous
Smith, Matt
Smith, Maxim
Casey, Doug
Paperback
The Principal's Playbook on Instructional Leadership: 23 Things That Matter Most for Improving Student Achievement
McLaurin Ed D. Nbct, Josh
Paperback
The 5 Love Languages of Children: The Secret to Loving Children Effectively
Chapman, Gary
Campbell, Ross
Paperback
Teaching with AI: A Practical Guide to a New Era of Human Learning
Watson, C. Edward
Bowen, José Antonio
Paperback
Forward, Together: Moving Schools from Conflict to Community in Contentious Times
Couros, George
Paperback
Facing the Fantasy, Finding the Way Forward: Every Educator's Guide to Moving Beyond Behavior Management to Lasting Behavioral Change Using Neuroscien
Bowman, Rick
Bowman, Doris
Paperback
Scholastic Success with Reading Comprehension Grade 1 Workbook
Scholastic Teaching Resources
Paperback
The Writing Revolution 2.0: A Guide to Advancing Thinking Through Writing in All Subjects and Grades
Hochman, Judith C.
Wexler, Natalie
Paperback
Transform Your Teaching with Universal Design for Learning: Six Steps to Jumpstart Your Practice
Pusateri, Jennifer L.
Paperback
Black People Invented Everything: The Deep History of Indigenous Creativity
Dass, Sujan Kumar
Paperback