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  1. By: Rocha, P L E - Rangelsalazar, J L - Marshall, Joe T. (Joe Truesdell)
    Type: Article
    In: The journal of raptor research
    Volume: 31
    Issue: 3
    Date: 1997
    Page Range: 276--279
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Rocha, P L E - Rangel-Salazar, J L
    Type: Article
    In: The journal of raptor research
    Volume: 35
    Issue: 2
    Date: 2001
    Page Range: 107--114
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-