Bibliography
Baird, S. F. 1859. Reptiles of the boundary, with notes by the naturalists of the survey, In Report of the United States and Mexican Boundary Survey, Under the Order of Lieut. Col. W.H. Emory, Major First Cavalry, and United States Commissioner. Volume 2, Part II, Reptiles. Department of the Interior [Washington, D.C.], 1-35.
