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  1. By: Patla, S M - Trost, Charles H. (Charles Henry),
    Type: Article
    In: The journal of raptor research
    Volume: 29
    Issue: 1
    Date: 1995
    Page Range: 44--44
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Patla, S M
    Type: Article
    In: The journal of raptor research
    Volume: 39
    Issue: 3
    Date: 2005
    Page Range: 324--334
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-