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  1. By: Christiansen, D A - Reinert, S E
    Type: Article
    In: The journal of raptor research
    Volume: 24
    Issue: 4
    Date: 1990
    Page Range: 84--90
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Reinert, S E
    Type: Article
    In: Raptor research
    Volume: 18
    Issue: 1
    Date: 1984
    Page Range: 25--29
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]