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  1. By: Mclean, P K - Byrd, Mitchell A.
    Type: Article
    In: The journal of raptor research
    Volume: 25
    Issue: 4
    Date: 1991
    Page Range: 109--112
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Stinson, C H - Byrd, Mitchell A. - Bean, Glen
    Type: Article
    In: Raptor research
    Volume: 10
    Issue: 3
    Date: 1976
    Page Range: 90--91
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]
  3. By: Watts, Bryan D., - Byrd, Mitchell A. - Watts, Marian U.
    Type: Article
    In: The journal of raptor research
    Volume: 38
    Issue: 1
    Date: 2004
    Page Range: 47--54
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-