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  1. By: Colin, Patrick L
    Type: Article
    In: Zoologica : scientific contributions of the New York Zoological Society
    Volume: 57
    Issue: 10
    Date: 1973-04-25
    Page Range: 137--169
    Publication Info: New York,
  2. By: Colin, Patrick L
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 91
    Date: 1978
    Page Range: 191--196
    Publication Info: Washington Biological Society of Washington