BioStor
 | Amphibians and Reptiles from El Valle de Anton, Panama E R Dunn (1933) Occasional Papers of the Boston Society of Natural History 8: 65-79 |
 | A bibliography of Mexican Amphibiology E H Taylor (1947) University of Kansas Science Bulletin 31: 543-589 |
 | The sangamon interglacial vertebrate fauna from Rancho la Brisca, Sonora, Mexico Thomas R Van Devender, Amadeo M Rea and Michael L Smith (1985) Transactions of the San Diego Society of Natural History 21: 23-55 |