Fossils

Links With the Past in the Plant World

The Coal Measures Amphibia of North America

Fossils: A Story of the Rocks and Their Record of Prehistoric Life Denver Museum of Natural History, Popular Series No. 3

The Radio Boys with the Forest Rangers; Or, The great fire on Spruce Mountain

The Romance of Modern Geology

The Adventures of a Grain of Dust

Thoughts on a Pebble, or, A First Lesson in Geology

Cave Hunting

The Lost Lemuria

Pleistocene Bats from San Josecito Cave, Nuevo Leon, Mexico

Voyager 1 Encounters Saturn

The Rise and Progress of Palaeontology

Fossil Forests of the Yellowstone National Park

The Ultimate Rockhounding Handbook

The Flow of Time in the Connecticut Valley: Geological Imprints

The Geologic Setting of the John Day Country: Grant County, Oregon

Texas Rocks and Minerals: An Amateur's Guide

The Common Rocks and Minerals of Missouri

Snails

Cambrian Ocean World