Rocks & Minerals

Texas Rocks and Minerals

Links With the Past in the Plant World

Notes on Collecting and Preserving Natural-History Objects

The Ultimate Rockhounding Handbook

Snails

Ancient Landscapes of the Grand Canyon Region

The Book of the Pearl

The Geology of Mt. Mansfield State Forest

Texas Gemstones

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

The Common Rocks and Minerals of Missouri

Geology: The Science of the Earth's Crust

Fossil Forests of the Yellowstone National Park

The Geologic Story of Palo Duro Canyon

Gems in the Smithsonian Institution

Underground Treasures: How and Where to Find Them

The Geology of Groton State Forest

Walks and Talks in the Geological Field

A Short History of the Academy of Natural Sciences of Philadelphia

Devils Tower National Monument