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  1. By: Schmidt, Robert E. - Ferraris, Carl J.
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 98
    Date: 1985
    Page Range: 341--346
    Publication Info: Washington, Biological Society of Washington,
  2. By: Schmidt, Robert E. - Shoobs, Nathaniel - McMullin, Erin
    Type: Article
    In: ZooKeys
    Volume: 748
    Date: 2018
    Page Range: 89-95
    Publication Info: Pensoft Publishers 2018
  3. By: Schmidt, Robert E. - Kiviat, Erik
    Type: Article
    In: The Canadian field-naturalist
    Volume: 121
    Issue: 2
    Date: 2007-04-01
    Page Range: 128--132
    Publication Info: Ottawa Ottawa Field-Naturalists' Club