BioStor
 | Generic types of nearctic Reptilia and Amphibia A E Brown (1908) Proceedings of the Academy of Natural Sciences of Philadelphia 60: 112-127 |
 | A new species of Xantusia from Arizona, with a synopsis of the genus Laurence M Klauber (1931) Transactions of the San Diego Society of Natural History 7(1): 1-16 |
 | An annotated checklist and key to the snakes of Mexico H M Smith and E H Taylor (1945) US Natl. Mus. Bull. 187: 1-239 |