Rocks & Minerals

Links With the Past in the Plant World

Texas Rocks and Minerals

The Coal Measures Amphibia of North America

Mountain

My Attainment of the Pole

The Frozen North

The Coal Measures Amphibia of North America

Life's Dawn on Earth

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

Beach Rambles in Search of Seaside Pebbles and Crystals

The Black Moose in Pennsylvania

Evolution

Dinosaurs, with Special Reference to the American Museum Collections

Mineral Survey Procedures Guide, 1980

Animals of the Past

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

The Petrified Man

The Geology of Mt. Mansfield State Forest