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An Introduction to Geology – Free Textbook for College-
An Introduction to Geology (Johnson, Affolter, Inkenbrandt, and Mosher)
Physical Geology - Open Textbook Library
An Introduction to Geology - slcc.pressbooks.pub
Download a PDF – Physical Geology – 2nd Edition
An Introduction to Geology – Simple Book Publishing
1: Introduction to Geology - Geosciences LibreTexts