BioStor
 | 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 |
 | Taxonomy and distribution of the horned lizard genus Phrynosoma W L Reeve (1952) University of Kansas Science Bulletin 34: 817-960 |
 | Proposed use of the plenary powers to validate the generic name "Phrynosoma" Wiegmann, 1828 (Class Reptilia, Order Squamata), a name placed on the "Official List of Generic Names in Zoology" by the ruling given in "Opinion" H M Smith (1957) Bull. Zool. Nom. 13: 267-279 |