The Audubon Society Field Guide to North American FossilsBy Ida Thompson. Photographs by Townsend P. Dickinson. Visual Key by Carol Nehring ( Read more... )

The Oxford Companion to the EarthEditors: Paul L. Hancock and Brian J. Skinner ( Read more... )

Encyclopedia of Caves

Edited by David C. Culver and William B. White.

Elsevier Academic Press, 2005.

From the "Guide to the Encyclopedia": "The Encyclopedia of Caves is a complete source of information on the subject of caves and life in caves, contained within a single volume. Each article in the Encyclopedia provides an overview of the ( Read more... )