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  1. By: Madden, Elizabeth M. - Hansen, Andrew J. - Murphy, Robert K
    Type: Article
    In: The Canadian field-naturalist
    Volume: 113
    Issue: 4
    Date: 1999
    Page Range: 627--640
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Perry, Neil D. - Stewart, Donald T. - Madden, Elizabeth M. - Maier, Thomas J
    Type: Article
    In: The Canadian field-naturalist
    Volume: 118
    Issue: 3
    Date: 2004-07-01
    Page Range: 400--404
    Publication Info: Ottawa Ottawa Field-Naturalists' Club