Duellman, William Edward 1930-
On the classifications of frogs / by William E. Duellman. -- Lawrence : University of Kansas, 1975 - 14 p.
Separata de : Occasional papers of the Museum of Natural History. Vol. 42 (1975)
Anfibios
597.6
On the classifications of frogs / by William E. Duellman. -- Lawrence : University of Kansas, 1975 - 14 p.
Separata de : Occasional papers of the Museum of Natural History. Vol. 42 (1975)
Anfibios
597.6