Nature

The Geography of New Jersey

Deserts: Geology and Resources

The Daffodil Fields

A Medley of Weather Lore

The Treasure of the Humble

The botanist's repository for new and rare plants; vols 1 & 2

Birds of the National Parks in Hawaii

Ferns of Hawaii National Park

Fossil Forests of the Yellowstone National Park

The Land of Enchantment: From Pike's Peak to the Pacific

Birds in Legend, Fable and Folklore

The Geologic Story of Palo Duro Canyon

Lassen Trails: A Brief Guide to the Trails of Lassen Volcanic National Park

Shaggycoat

The Underworld of Oregon Caves National Monument

Island Trail at Walnut Canyon. Walnut Canyon National Monument

The Spell of the White Sturgeon

The Study of Plant Life

Gems in the Smithsonian Institution

The Boy With the U. S. Foresters