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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Nichols, F H
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 82
    Date: 1969
    Page Range: 205--208
    Publication Info: Washington, Biological Society of Washington,
  2. By: Banse, Karl. - Nichols, F H
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 81
    Date: 1968
    Page Range: 223--230
    Publication Info: Washington, Biological Society of Washington,