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  1. By: Sobey, Douglas G. - Glen, W. M.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 116
    Issue: 4
    Date: 2002
    Page Range: 585--602
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Sobey, Douglas G. - Glen, W. M.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 118
    Issue: 4
    Date: 2004-10-01
    Page Range: 504--520
    Publication Info: Ottawa Ottawa Field-Naturalists' Club