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  1. By: Zweifel, Richard George, - Allison, Allen.
    Publication info: New York, N.Y, American Museum of Natural History, c1982
    Holding Institution: American Museum of Natural History Library
    Subjects: Amphibians  Aphantophryne  Classification  Cophixalus  Cophixalus sphagnicola  Frogs  New Guinea  Papua New Guinea
  2. By: Zweifel, Richard George, - Parker, Fred
    Publication info: New York, American Museum of Natural History, c1989
    Holding Institution: American Museum of Natural History Library
    Subjects: Amphibians  Aphantophryne  Classification  Cophixalus verecundus  Owen Stanley Mountains  Papua New Guinea