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  1. By: Werler, John E
    Type: Article
    In: Zoologica : scientific contributions of the New York Zoological Society
    Volume: 36
    Issue: 3
    Date: 1951-04-20
    Page Range: 37--48
    Publication Info: New York,
  2. By: Burger, W. Leslie - Werler, John E
    Type: Article
    In: The University of Kansas science bulletin
    Volume: 36
    Date: 1954-07-15
    Page Range: 643--672
    Publication Info: [Lawrence], University of Kansas, [1926-1996]