BioStor
Pituophis catenifer affinis HALLOWELL 1852
 | Herpetology of the Zuni Mountains Region, Northwestern New Mexico Frederick R Gehlbach (1965) Proc. US. Natl. Mus 116: 243-332 |
 | Biogeography and distribution of the reptiles and amphibians on islands in the Gulf of California, Mexico (1966) Transactions of the San Diego Society of Natural History 14: 137-156 |
 | The amphibians and reptiles of Sinaloa, Mexico L M Hardy and And R W Mcdiarmid (1969) University of Kansas Publications. Museum of Natural History 18: 39-252 |
 | Snakes of Western Chihuahua W W Tanner (1985) Great Basin Naturalist 45: 615-676 |
 | An ecogeographic analysis of the herpetofauna of the Sierra San Pedro Mártir region, Baja California, with a contribution to the biogeography of the Baja California herpetofauna Welsh Jr and Hartwell H (1988) Proceedings of the California Academy of Sciences 46: 1-72 |