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  1. Cryptic species of a cascade frog from Southeast Asia : taxonomic revisions and descriptions of six new species. American Museum novitates ; no. 3417
    By: Bain, Raoul H. - Cuc, Ho Thu. - Lathrop, Amy. - Murphy, Robert W. - Orlov, Nikolai L.
    Publication info: New York, NY : American Museum of Natural History 2003
    Contributed by: American Museum of Natural History Library
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  2. Frogs of Vietnam : a report on new collections / Robert F. Inger, Nikolai Orlov, Ilya Darevsky.
    By: Inger, Robert F. - Darevskii, I. S. - Orlov, Nikolai L.
    Publication info: [Chicago, Ill.] :Field Museum of Natural History,c1999.
    Contributed by: University Library, University of Illinois Urbana Champaign
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  1. Frogs of Vietnam: A report on new collections
    By: Inger, R F - Orlov, Nikolai L. - Darevsky, I S
    Type: Article
    In: Fieldiana. Zoology. New Series
    Volume: 92
    Date: 1999
    Page Range: 1--46
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  2. Systematics of the vipers of the Caucasus: Polymorphism or sibling species?
    By: Nilson, Göran - Tuniyev, Boris S. - Orlov, Nikolai L. - Hoggren, Mats. - Andrén, Claes
    Type: Article
    In: Asiatic Herpetological Research
    Volume: 6
    Date: 1995
    Page Range: 1--16
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