Rocks & Minerals

The Geology of D.A.R. State Park, Mt. Philo State Forest Park, Sand Bar State Park

The Geologic Story of Glacier National Park

Texas Rocks and Minerals: An Amateur's Guide

The Geologic Story of Palo Duro Canyon

The Common Rocks and Minerals of Missouri

Field Book of Common Rocks and Minerals

Geology: The Science of the Earth's Crust

Cave Regions of the Ozarks and Black Hills

Across Mongolian Plains

Gems in the Smithsonian Institution

Ancient Landscapes of the Grand Canyon Region

North America

Lifeful Stories of Lifeless Rocks

Gemstones

The Glaciers of the Alps

Pleistocene Bats from San Josecito Cave, Nuevo Leon, Mexico

Pleistocene Bats from San Josecito Cave, Nuevo Leon, Mexico

Underground Treasures: How and Where to Find Them

Fragments of Earth Lore: Sketches & Addresses Geological and Geographical

Mount Rainier, a Record of Exploration