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  1. By: Konrad, Paul M - Gilmer, David S.
    Type: Article
    In: The journal of raptor research
    Volume: 22
    Issue: 3
    Date: 1988
    Page Range: 92--93
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Konrad, Paul M - Gilmer, David S.
    Type: Article
    In: Raptor research
    Volume: 20
    Issue: 1
    Date: 1986
    Page Range: 35--38
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]