A new species of microhylid frog, genus Oreophryne, from Papua New Guinea 2 tables von Zweifel, Richard G. 1926-2019

A new genus of genyophrynine microhylid frogs from New Guinea von Burton, Thomas C., Zweifel, Richard G. 1926-2019

A revision of the frogs of the subfamily Asterophryinae, family Microhylidae von Zweifel, Richard G. 1926-2019

Reproductive biology of anurans of the arid southwest, with emphasis on adaptation of embryos to temperature von Zweifel, Richard G. 1926-2019

Herpetology of the Tres Marias Islands von Zweifel, Richard G. 1926-2019

Two pelobatid frogs from the Tertiary of North America and their relationships to fossil and recent forms von Zweifel, Richard G. 1926-2019

Systematics of microhylid frogs, genus Oreophryne, living at high elevations in New Guinea 2 tables von Zweifel, Richard G. 1926-2019, Cogger, Harold G. 1935-, Richards, Stephen J.

Systematics of microhylid frogs, genus Oreophryne, from the north coast region of New Guinea 3 tables von Zweifel, Richard G. 1926-2019, Menzies, James I., Price, David

Partition of the australopapuan microhylid frog genus Spenophryne with descriptions of new species von Zweifel, Richard G. 1926-2019

Australian frogs of the family Microhylidae von Zweifel, Richard G. 1926-2019

A synopsis of the lizards of the sexlineatus group (genus Onemidophorus) von Duellman, William E. 1930-, Zweifel, Richard G. 1926-2019

Variation in and distribution of lizards of western Mexico related to Cnemidophorus sacki von Zweifel, Richard G. 1926-2019

Ecology, distribution, and systematics of frogs of the Rana boylei group von Zweifel, Richard G. 1926-2019

Reptilien & Amphibien

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