Rocks & Minerals

Texas Rocks and Minerals

Links With the Past in the Plant World

Snails

Across Mongolian Plains

Underground Treasures: How and Where to Find Them

The Ornithosauria

A Short History of the Academy of Natural Sciences of Philadelphia

Devils Tower National Monument

The Ultimate Rockhounding Handbook

The Glaciers of the Alps

Biology, The Myth Of Evolution

Cave Regions of the Ozarks and Black Hills

Walks and Talks in the Geological Field

The Geologic Story of Glacier National Park

Field Book of Common Rocks and Minerals For identifying the Rocks and Minerals of the United States and interpreting their Origins and Meanings

Mount Rainier, a Record of Exploration

Geology: The Science of the Earth's Crust

Texas Rocks and Minerals: An Amateur's Guide

The Geologic Story of Palo Duro Canyon

British Museum (Natural History) General Guide