Nature

Key and Guide to Native Trees, Shrubs, and Woody Vines of Dallas County

The Dolphin in History

The Study of Plant Life

The Underworld of Oregon Caves National Monument

Cactus Forest Drive, Saguaro National Monument

Wild Animals of the Rockies. With a List of Mammals found in Rocky Mountain National Park

The Geologic Story of Palo Duro Canyon

The Botanical Lore of the California Indians with Side Lights on Historical Incidents in California

Poisonous Snakes of Texas and First Aid Treatment of Their Bites

A Journey in Brazil

The Geologic Story of Colorado National Monument

Creation of the Teton Landscape: The Geologic Story of Grand Teton National Park

Texas Rocks and Minerals: An Amateur's Guide

Forest Trees of Texas: How to Know Them

Secrets of Earth and Sea

Grand Teton: A Guide to Grand Teton National Park, Wyoming

A Manual of Bird Study. A Description of Twenty-Five Local Birds with Study Options

Whale Primer, with Special Attention to the California Gray Whale

Amphibians and Reptiles in Captivity

Birds of the National Parks in Hawaii