BioStor
 | A brief review of the snakes of Costa Rica E H Taylor (1951) University of Kansas Science Bulletin 34: 3-188 |
 | Notes on a small herpetological collection from Guerreo C W Hall (1951) University of Kansas Science Bulletin 34: 201-212 |
 | The amphibians and reptiles of Michoacán, México W E Duellman (1961) University of Kansas Publications. Museum of Natural History 15: 1-148 |
 | Amphibians and reptiles of the rainforests of southern El Petén, Guatemala W E Duellman (1963) University of Kansas Publications. Museum of Natural History 15: 205-249 |
 | Amphibians and reptiles from the Yucatán Peninsula, México W E Duellman (1965) Univ. Kansas Publ. Mus. Nat. Hist 15: 577-614 |
 | 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 |