University Press of Colorado
- American Women in World War I
- The Incas
- The Yellowstone Story, Revised Edition, Volume I
- The Ute Indians of Utah, Colorado, and New Mexico
- Listening to Cougar
- Conversing with the Planets
- The Geysers of Yellowstone
- The Boys of Winter
- The Explorer's Guide to Death Valley National Park
- An Inca Account of the Conquest of Peru
- The End of Time
- Scared Text
- Wapiti Wilderness
- Empires of Time