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  1. By: Mackenzie, David I
    Type: Article
    In: The Canadian field-naturalist
    Volume: 96
    Issue: 1
    Date: 1982
    Page Range: 61--68
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Van Wynsberghe, Nicole Raymonde, - Rising, Jim, - Mackenzie, David I
    Type: Article
    In: The Wilson bulletin
    Volume: 104
    Issue: 4
    Date: 1992
    Page Range: 612--629
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-