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  1. By: Leafloor, James O - Thompson, John E - Ankney, C Davison
    Type: Article
    In: The Wilson bulletin
    Volume: 108
    Issue: 3
    Date: 1996
    Page Range: 567--572
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Abraham, Kenneth F - Leafloor, James O - Lumsden, Harry G
    Type: Article
    In: The Canadian field-naturalist
    Volume: 113
    Issue: 2
    Date: 1999
    Page Range: 245--250
    Publication Info: Ottawa Ottawa Field-Naturalists' Club