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  1. Population dynamics of Leptomeryx / [by] John Clark -- and Thomas E. Guensburg --.
    By: Clark, John, - Guensburg, Thomas Edgar,
    Publication info: [Chicago] :Field Museum of Natural History,1970.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Leptomeryx  Mammal populations  Nebraska  Oligocene  Paleontology  Pennington County  Sioux County  South Dakota  
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  2. Two pelobatid frogs from the Tertiary of North America and their relationships to fossil and Recent forms. American Museum novitates ; no. 1762
    By: Alexander, Annie Montague, 1867-1950. - Clark, John, 1909-1967. - Kellogg, Louise Phelps, d. 1942. - Zweifel, Richard George, 1926-
    Publication info: New York, N.Y. : American Museum of Natural History 1956
    Contributed by: American Museum of Natural History Library
    Subjects: Amphibians, Fossil  Anura  Anura, Fossil  Eopelobates grandis  Evolution  Evolution.   Fish Lake Watershed  Nevada  North America  Oligocene  Paleontology  Pelobatidae  Pennington County  Pliocene  Scaphiopus alexanderi  South Dakota  
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