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  1. By: Douglas, George W. - Penny, Jenifer L. - Barton, Ksenia
    Type: Article
    In: The Canadian field-naturalist
    Volume: 120
    Issue: 2
    Date: 2006-04-01
    Page Range: 183--187
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Douglas, George W. - Penny, Jenifer L. - Barton, Ksenia
    Type: Article
    In: The Canadian field-naturalist
    Volume: 120
    Issue: 2
    Date: 2006-04-01
    Page Range: 163--168
    Publication Info: Ottawa Ottawa Field-Naturalists' Club