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  1. By: Chavin, Walter - Gordon, Myron,
    Type: Article
    In: Zoologica : scientific contributions of the New York Zoological Society
    Volume: 36
    Issue: 8
    Date: 1951-08-20
    Page Range: 135--145
    Publication Info: New York,
  2. By: Chavin, Walter
    Type: Article
    In: Zoologica : scientific contributions of the New York Zoological Society
    Volume: 41
    Issue: 13
    Date: 1956-11-23
    Page Range: 101--104
    Publication Info: New York,