Distributional Study of the Amphibians of the Isthmus of Tehuantepec, MéxicoWilliam Edward DuellmanHäftad219 kr
Descriptions of Two Species of Frogs, Genus Ptychohyla / Studies of American Hylid Frogs, VWilliam Edward DuellmanHäftad209 kr
Type Specimens of Amphibians and Reptiles in the Museum of Natural History, the University of KansasWilliam Edward Duellman, Barbara BergHäftad209 kr
South American HerpetofaunaWilliam Edward Duellman, Symposium on the South American Herpe, Society for the Study of Amphibians andHäftad419 kr
Distributional Study of the Amphibians of the Isthmus of Tehuantepec, MéxicoWilliam Edward DuellmanHäftad219 kr
Type Specimens of Amphibians and Reptiles in the Museum of Natural History, the University of KansasWilliam Edward Duellman, Barbara BergHäftad209 kr
Descriptions of Two Species of Frogs, Genus Ptychohyla / Studies of American Hylid Frogs, VWilliam Edward DuellmanHäftad209 kr