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AP Environmental Science by University of California College Prep (CC BY)
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Astronomy by Franknoi, Morrison, and Wolff (CC BY)
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Earthquakes by OpenLearn (CC BY-NC-SA)
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An Introduction to Geology by Johnson, Affolter, Inkenbrandt, and Mosher (CC BY-NC-SA)
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Laboratory Manual for Introductory Geology by Deline, Harris, and Tefend (CC BY-SA)
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Plate Tectonics by OpenLearn (CC BY-NC-SA)
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NIH Curriculum Supplement Series by National Institutes of Health (PD)
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UGA Anatomy and Physiology I Lab Manual by Hesse, Cozart, Szymik, and Nichols (CC BY)
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UGA Anatomy and Physiology II Lab Manual by Hesse, Cozart, Szymik, and Nichols (CC BY)

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