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  1. By: Douglas, George W. - Pojar, Jim - Meidinger, Del - McKeown, Karen
    Type: Article
    In: The Canadian field-naturalist
    Volume: 108
    Issue: 4
    Date: 1994
    Page Range: 391--396
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Douglas, George W. - Pojar, Jim
    Type: Article
    In: The Canadian field-naturalist
    Volume: 115
    Issue: 2
    Date: 2001
    Page Range: 343--343
    Publication Info: Ottawa Ottawa Field-Naturalists' Club