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Zweifel, Richard G.

Systematic Status of the Central American Frog, Rana miadis

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Herpetologists' League, 1967

Published in: Herpetologica
Zweifel, Richard G.

Distribution and Mating Calls of the Panamanian Toads, Bufo coccifer and B. granulosus

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JSTOR, 1965

Published in: Copeia
Zweifel, Richard G.

Distribution and Life History of a Central American Frog, Rana vibicaria

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JSTOR, 1964

Published in: Copeia
Zweifel, Richard G.

Life History of Phrynohyas venulosa (Salientia: Hylidae) in Panama

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JSTOR, 1964

Published in: Copeia
Zweifel, Richard G.

Les Batraciens.G. Pasteur , J. Bons

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University of Chicago Press, 1962

Published in: The Quarterly Review of Biology
Zweifel, Richard G.

Analysis of Hybridization between Two Subspecies of the Desert Whiptail Lizard, Cnemidophorus tigris

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JSTOR, 1962

Published in: Copeia
Zweifel, Richard G.

Notes on the Distribution and Reproduction of the Lizard Eumeces callicephalus

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Herpetologists' League, 1962

Published in: Herpetologica
Zweifel, Richard G.

Review: Les Batraciens

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American Institute of Biological Sciences, 1962

Published in: The Quarterly Review of Biology
Zweifel, Richard G.

Another Method of Incubating Reptile Eggs

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JSTOR, 1961

Published in: Copeia
Zweifel, Richard G.

Relationship of Two Whiptail Lizards (Genus Cnemidophorus) in Western Mexico

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JSTOR, 1961

Published in: Copeia
Zweifel, Richard G.

Effect of Temperature on Call of the Frog, Bombina variegata

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JSTOR, 1959

Published in: Copeia
Zweifel, Richard G.

Cnemidophorus tigris variolosus, a Revived Subspecies of Whiptail Lizard from Mexico

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JSTOR, 1958

Published in: The Southwestern Naturalist
Zweifel, Richard G.

Cnemidophorus tigris variolosus, a Revived Subspecies of Whiptail Lizard from Mexico

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Southwestern Association of Naturalists, 1958

Published in: The Southwestern Naturalist
Zweifel, Richard G.

The Lizard Eumeces tetragrammus in Coahuila, Mexico

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Chapman Grant, 1958

Published in: Herpetologica
Zweifel, Richard G.

A New Frog of the Genus Rana from Michoacan, Mexico

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JSTOR, 1957

Published in: Copeia
Zweifel, Richard G.

Studies on the Critical Thermal Maxima of Salamanders

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Wiley, 1957

Published in: Ecology
Zweifel, Richard G.

Studies on the Critical Thermal Maxima of Salamanders

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Duke University Press, 1957

Published in: Ecology
Zweifel, Richard G.

The Identity of the Mexican Lizard, Cnemidophorus gadovi

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JSTOR, 1956

Published in: Copeia
Zweifel, Richard G.

Adaptation to Feeding in the Snake Contia tenuis

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JSTOR, 1954

Published in: Copeia
Zweifel, Richard G.

A New Rana from the Pliocene of California

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JSTOR, 1954

Published in: Copeia

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