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  1. By: De Solla, Shane R. - Campbell, Douglas - Bishop, Christine A
    Type: Article
    In: The Canadian field-naturalist
    Volume: 115
    Issue: 3
    Date: 2001
    Page Range: 510--512
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Alvo, Robert - Campbell, Douglas
    Type: Article
    In: The Canadian field-naturalist
    Volume: 114
    Issue: 4
    Date: 2000
    Page Range: 700--702
    Publication Info: Ottawa Ottawa Field-Naturalists' Club