distribution
Olendorff, R. R. 1993. Status, biology, and management of ferruginous hawks: a review. Raptor Res. and Tech. Asst. Cen., Spec. Rep. U.S. Dept. Interior, Bur. Land Manage., Biose, Idaho.. . 84 p.
Hobbs, Jr., H. H. 1976a. Crayfishes (Astacidae) of North and Middle America. Biological Methods Branch, Environmental Protection Agency, Cincinnati, Ohio. 173 pp.
Sibley, Charles G. and Burt L. Monroe, Jr. 1990. Distribution and Taxonomy of Birds of the World. Yale University Press. New Haven, Connecticut and London. 1111pp.
Ridgely, R. S. and J. A. Gwynne, Jr. 1989. A Guide to the Birds of Panama. 2nd edition. Princeton University Press, Princeton, USA.
Frost, D. R. 1985. Amphibian species of the world. A taxonomic and geographical reference. Allen Press, Inc., and The Association of Systematics Collections, Lawrence, Kansas. v + 732 pp.
Burt, W. H. 1976. A field guide to the mammals. Houghton Mifflin Company, Boston, Massachusetts. 289 pp.
Howell, J.T., E. McClintock, and collaborators. 1960. Supplement. In T.H. Kearney, R.H. Peebles, and collaborators. 1951. Arizona Flora. 2nd Edition with Supplement. Univ. California Press, Berkeley. Pages 1033-1085.
Kearney, T.H., R.H. Peebles, and collaborators. 1951. Arizona flora. 2nd edition with Supplement (1960) by J.T. Howell, E. McClintock, and collaborators. Univ. California Press, Berkeley. 1085 pp.
Ceballos-G., G. y D. Wilson. 1985. Cynomys mexicanus. Mamm. Species, 248: 1-3.
Anderson, N. H. 1976b. The distribution and biology of the Oregon Trichoptera. Oregon State University Agricultural Experiment Station Technical Bulletin 134. 152 pp.