Digital library
Textbooks, references and open learning resources.

External
Classical Mechanics
Jeremy Tatum · University of Victoria
Classical mechanics is the study of the motion of bodies (including the special case in which bodies remain at rest) in accordance with the general principles first enunciated by Sir Isaac Newton in his Philosophiae Naturalis Principia Mathematica (1687), commonly known as the Principia.

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Introduction to Health 2e
Kelly Falcone · Palomar College
In the contents: 2.05: Guidance for your current level of physical activity

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Introduction to Physical Electronics
William L. Wilson · Rice University
In the contents: 6.04: Line Impedance

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College Success
Lumen Learning · LibreTexts
In the contents: 6.08: Outcome- Class Attendance · 6.24: Assignment- Class Attendance

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Fundamentals of Geology
Kimberly Schulte · Columbia Basin College
In the contents: 2.08: Abundance of Elements in Earth's Crust

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Foundations in Action: Early Childhood Practicum and Field Experience
Shoshana Grattidge · Los Angeles Mission College
In the contents: 11.03: Positive Guidance Strategies

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Field Experience Practicum in ECE
Laura Daly · Woodland Community College
In the contents: 01: Practical Guidance for New Teachers and Practicum Students · 1.08: Balance Guidance with Choices · 7.07: Implementing the Lesson- Practical Guidance

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Sound - An Interactive eBook
Kyle Forinash and Wolfgang Christian · LibreTexts
In the contents: 3.11.03: Impedance · 3.11.3.01: Impedance · 3.11.3.02: Impedance Simulation

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Interactive Chemistry
John Moore, Jia Zhou, and Etienne Garand · University of Wisconsin
In the contents: 6.02: Elemental Abundances

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Blueprint for Success in College and Career
Dave Dillon · Grossmont College
LibreTexts

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The Fundamentals of Stellar Astrophysics
George W. Collins II · Ohio State University
In the contents: 4.02: The Ionization Abundances and Opacity of Stellar Material

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The Human Story: An Introduction to the Humanities
Nicholas Vargas-Rose (né Andrews) · Coalinga College
In the contents: 11.1.08: Music and Dance

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Operational Amplifiers: Theory and Practice
James K. Roberge · Massachusetts Institute of Technology
In the contents: 2.05: EFFECTS OF FEEDBACK ON INPUT AND OUTPUT IMPEDANCE

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Fit Happens: Essential Principles of Fitness, Wellness, and Health
Danielle Altman, Rusty Johnson, and Cheryl Owiesny · De Anza College
A comprehensive introductory kinesiology textbook designed for activity-based fitness classes. Covers wellness, physical fitness principles, cardiorespiratory endurance, muscular strength and endurance, flexibility, mobility, low-back health, and body composition. Includes practical guidance on program design, nutrition, and weight management, plus health topics like stress, sleep, mental health, cardiovascular disease, diabetes, cancer, immunity, disease prevention, and substance use and misuse

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Administration II (CD 039)
Ancelma Sanchez · East Los Angeles College
In the contents: 4.07: Working with Licensing Specialists - Guidance and Accountability · 5.15: Behavior Guidance · 11.15: Weekly Time Card and Attendance Record

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Electromagnetics I
Steven W. Ellingson · Virginia Tech
In the contents: 3.07: Characteristic Impedance · 3.15: Input Impedance of a Terminated Lossless Transmission Line · 3.16: Input Impedance for Open- and Short-Circuit Terminations

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Physical Optics
Jeremy Tatum · University of Victoria
In the contents: 2.05: Impedance

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PHIL 310: Introduction to Ethics
Christian Bauer · Folsom Lake College
In the contents: 1.2.03: Acting for the Sake of Duty and Acting in Accordance with Duty · 1.3.08: Objection- Unclear Guidance

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BIO 5: General Botany
Teresa Friedrich Finnern · Norco College
In the contents: 9.04: Etiolation and Shade Avoidance

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The Tongue and Quill
US Air Force · LibreTexts
In the contents: 20.3: Associated Press (AP) Style Guidance for Official Biographies