Geology
Here are a couple of textbooks in the public domain, made available by the U.S. Geological Survey:
- Study Guide for a Beginning Course in Ground-Water Hydrology by O. Lehn Franke, Thomas E. Reilly, Ralph J. Haefner and Dale L. Simmons
- This Dynamic Earth: The Story of Plate Tectonics by Jacquelyne Kious and Robert I. Tilling
1 comment August 6th, 2007
