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  1. By: Kellner, Christopher J. - Ritchison, Gary
    Type: Article
    In: Transactions of the Kentucky Academy of Science
    Volume: 46
    Issue: 3-4
    Date: 1985-09
    Page Range: 138--142
    Publication Info: [Lexington, Ky.], Kentucky Academy of Science, 1923-1997
  2. By: Kellner, Christopher J.
    Type: Article
    In: The journal of raptor research
    Volume: 24
    Issue: 3
    Date: 1990
    Page Range: 56--58
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-