Burns, William A. (ed.). The Natural History of the Southwest. Franklin Watts, Inc., New York. 1960.
Dodge, Natt N. Flowers of the Southwest Deserts. Southwestern Monuments Association. Popular Series No. 4. Globe, Ariz. 1961.
——. Poisonous Dwellers of the Desert. Southwestern Monuments Association. Popular Series No. 3. Globe, Ariz. 1964.
Dodge, Natt N., and Herbert S. Zim. The Southwest. Golden Press, New York. 1962.
Earle, W. Hubert. Cacti of the Southwest. Desert Botanical Garden. Phoenix, Ariz. 1963.
Jaeger, Edmund C. The North American Deserts. Stanford University Press, Stanford, Calif. 1957.
Kearney, Thomas H., Robert H. Peebles, and collaborators. Arizona Flora. University of California Press, Berkeley. 1960.
Krutch, Joseph W. The Voice of the Desert. William Sloane Associates, Inc., New York. 1955.
Milne, Lorus, and Margery Milne. The Balance of Nature. Alfred A. Knopf, Inc., New York. 1960.
Olin, George. Mammals of the Southwest Deserts. Southwestern Monuments Association, Popular Series No. 8. Globe, Ariz. 1965.