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  1. By: Zimmermann, Arnold Albert, - Pope, Clifford H. (Clifford Hillhouse),
    Publication info: [Chicago], 1948
    Holding Institution: University Library, University of Illinois Urbana Champaign
  1. By: Zimmermann, Arnold Albert,
    Type: Article
    In: Zoologica : scientific contributions of the New York Zoological Society
    Volume: 35
    Issue: 1
    Date: 1950-04-17
    Page Range: 10--12
    Publication Info: New York,