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  1. By: Homan, H Jeffrey - Linz, George M - Bleier, William J - Carlson, Robert Bruce
    Type: Article
    In: The Wilson bulletin
    Volume: 108
    Issue: 1
    Date: 1996
    Page Range: 104--114
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Twedt, Daniel J. - Linz, George M - Bleier, William J
    Type: Article
    In: The Canadian field-naturalist
    Volume: 115
    Issue: 4
    Date: 2001
    Page Range: 549--554
    Publication Info: Ottawa Ottawa Field-Naturalists' Club