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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Heard, Richard W. - Perlmutter, Daniel G
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 90
    Date: 1977
    Page Range: 30--42
    Publication Info: Washington, Biological Society of Washington,
  2. By: Coyle, Frederick A. - O'shields, Theresa C. - Perlmutter, Daniel G
    Type: Article
    In: The Journal of arachnology
    Volume: 19
    Issue: 3
    Date: 1991
    Page Range: 62--66
    Publication Info: [Lubbock, Tex.], American Arachnological Society,