BioStor
Crotalus oreganus helleri MEEK 1905
 | Some new and revived subspecies of rattlesnakes Laurence M Klauber (1949) Transactions of the San Diego Society of Natural History 11: 61-116 |
 | The amphibians and reptiles from Rancho la Brea Bayard H Brattstrom (1953) Transactions of the San Diego Society of Natural History 11: 365-392 |
 | Evolution of the pit vipers Bayard H Brattstrom (1964) Transactions of the San Diego Society of Natural History 13: 185-268 |
 | Herpeto Fauna Of The Pacific Coast Of North Central Baja-California Mexico With A Description Of A New Subspecies Of Phyllodactylus-Xanti D L Bostic (1971) Transactions of The San Diego Society of Natural History 16: 237-263 |
 | The coachwhip snake Masticophis flagellum (Shaw): taxonomy and distribution Larry David Wilson (1971) Tulane Studies in Zoology and Botany 16(2): 31-99 |
 | 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 |