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  1. By: Scott, Peter A. - Hansell, Roger I C
    Type: Article
    In: The Canadian field-naturalist
    Volume: 103
    Issue: 3
    Date: 1989
    Page Range: 358--362
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Tsuji, Leonard J. S. - Kozlovic, Daniel R - Sokolowski, Marla B - Hansell, Roger I C
    Type: Article
    In: The Wilson bulletin
    Volume: 106
    Issue: 2
    Date: 1994
    Page Range: 329--337
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-