Nature

A Dissertation on Horses

With Axe and Rope in the New Zealand Alps

Our National Forests

Wild Life on the Rockies

Identification of the Larger Fungi

The Tadpoles of Bufo cognatus Say

Mammals of Mesa Verde National Park, Colorado

Two New Pocket Gophers from Wyoming and Colorado

Plain Tales of the North

Noteworthy Records of Bats From Nicaragua, with a Checklist of the Chiropteran Fauna of the Country

Little Busybodies: The Life of Crickets, Ants, Bees, Beetles, and Other Busybodies

Fish Populations, Following a Drought, in the Neosho and Marais des Cygnes Rivers of Kansas

Guide to Yosemite

Florida Caverns State Park

Wild Spain (España agreste)

Our Southern Highlanders

The Black Fawn

How We Are Fed: A Geographical Reader

My 1102 Days of W.W. II

Checking the Waste: A Study in Conservation