1950. An annotated check list of the reptiles and amphibians of Texas. Baylor Univ. Studies, pp. xii + 259.
1951. New locality records of reptiles in New Mexico. Copeia, 1951 (4):314.
1910. Zoology of Colorado. Univ. of Colorado, Boulder, vii + 262 pp.
1958. A field guide to the reptiles and amphibians of the United States and Canada east of the 100th Meridian. Houghton Mifflin Co., Boston, xviii + 366 pp.
1900. The crocodilians, lizards and snakes of North America. Rept. U. S. Nat. Mus. for 1898, pp. 153-1270.