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  1. By: Blair, Charles L. - Schitoskey, Frank
    Type: Article
    In: The Wilson bulletin
    Volume: 94
    Issue: 1
    Date: 1982
    Page Range: 46--54
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Blair, Charles L.
    Type: Article
    In: Raptor research
    Volume: 15
    Issue: 4
    Date: 1981
    Page Range: 120--120
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]