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  1. By: Balgooyen, Thomas G.
    Type: Article
    In: The journal of raptor research
    Volume: 23
    Issue: 3
    Date: 1989
    Page Range: 85--93
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Balgooyen, Thomas G.
    Type: Article
    In: The journal of raptor research
    Volume: 24
    Issue: 1-2
    Date: 1990
    Page Range: 27--28
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  3. By: Balgooyen, Thomas G.
    Type: Article
    In: The journal of raptor research
    Volume: 22
    Issue: 2
    Date: 1988
    Page Range: 71--71
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-