Rocks & Minerals

Texas Rocks and Minerals

Links With the Past in the Plant World

Notes on Collecting and Preserving Natural-History Objects

Snails

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

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

Geology: The Science of the Earth's Crust

The Geologic Story of Palo Duro Canyon

The Common Rocks and Minerals of Missouri

Gems in the Smithsonian Institution

Fossil Forests of the Yellowstone National Park

Ancient Landscapes of the Grand Canyon Region