Fossils

The Survival Handbook

The Rise and Progress of Palaeontology

North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus

Fossil Forests of the Yellowstone National Park

The Ultimate Rockhounding Handbook

The Flow of Time in the Connecticut Valley: Geological Imprints

The Pleistocene of North America and its vertebrated animals

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

The Silver Caves

The Glaciers of the Alps

Australasian Fossils: A Students' Manual of Palaeontology

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

The Ornithosauria

Pleistocene Bats from San Josecito Cave, Nuevo Leon, Mexico

Extinct Monsters

The Ancestry of Modern Amphibia: A Review of the Evidence

Pearls and Pebbles; or, Notes of an Old Naturalist