LITERATURE CITED
Aldrich, J. W., and Duvall, A. J.
1955. Distribution of American gallinaceous game birds. U.S. Dept. Int., Fish and Wildlife Ser., Circular 34:ii+30 pp.
Amadon, D., and Phillips, A. R.
1947. Notes on Mexican birds. Auk, 64:576-581, October.
American Ornithologists' Union Check-list Committee
1957. Check-list of North American birds. 5th ed. xiv+691 pp.
Baird, S. F.
1858. Reports of explorations and surveys for a railroad route from the Mississippi River to the Pacific Ocean. 9(pt. II—Birds):lvi+1005 pp.