P. S.  Martin, ?A Biogeography of Reptiles and Amphibians in the Gomez Farias Region, Tamaulipas, MexicoMiscellaneous Publications Museum of Zoology, University of Michigan, No. 101?, pp. 1-124, 1958.

A.  Schwartz, ?Another new large Eleutherodactylus (Amphibia: Leptodactylidae) from western CubaProceedings of The Biological Society of Washington?, vol. 71, pp. 37-42, 1958.

W. E.  Duellman, ?A PRELIMINARY ANALYSIS OF THE HERPETOFAUNA OF COLIMA, MEXICOOCCASIONAL PAPERS OF THE MUSEUM OF ZOOLOGY UNIVERSITY OF MICHIGAN?, pp. 1-22, 1958.

W. E.  Duellman, ?A review of the frogs of the genus Syrrhophus in western MexicoOCCASIONAL PAPERS OF THE MUSEUM OF ZOOLOGY UNIVERSITY OF MICHIGAN?, vol. 594, pp. 1-24, 1958.