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  1. By: Douglas, George W. - Illingworth, Jeanne M.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 118
    Issue: 2
    Date: 2004-04-01
    Page Range: 169--173
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Douglas, George W. - Illingworth, Jeanne M.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 112
    Issue: 2
    Date: 1998
    Page Range: 280--283
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Douglas, George W. - Illingworth, Jeanne M.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 111
    Issue: 4
    Date: 1997
    Page Range: 622--627
    Publication Info: Ottawa Ottawa Field-Naturalists' Club