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  1. By: Orr, R T - Webster, J D
    Type: Article
    In: Proceedings of the Biological Society of Washington.
    Volume: 81
    Date: 1968
    Page Range: 37--40
    Publication info: Washington,Biological Society of Washington
  2. By: Webster, J D
    Type: Article
    In: Proceedings of the Biological Society of Washington.
    Volume: 96
    Date: 1983
    Page Range: 664--668
    Publication info: Washington,Biological Society of Washington
  3. By: Webster, J D
    Type: Article
    In: Proceedings of the Biological Society of Washington.
    Volume: 113
    Date: 2000
    Page Range: 828--835
    Publication info: Washington,Biological Society of Washington