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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Springer, Victor G - Fricke, Ronald A
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 113
    Date: 2000
    Page Range: 386--396
    Publication Info: Washington, Biological Society of Washington,
  2. By: Clark, Guy T. - Fricke, Ronald A
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 98
    Date: 1985
    Page Range: 539--543
    Publication Info: Washington, Biological Society of Washington,