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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Iverson, E W
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 85
    Date: 1972
    Page Range: 541--547
    Publication Info: Washington, Biological Society of Washington,
  2. By: Iverson, E W - Wilson, George D. F.
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 93
    Date: 1981
    Page Range: 982--988
    Publication Info: Washington, Biological Society of Washington,