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  1. By: Whitacre, David F. (David Frederick) - López Ávila, Juventino. - López Ávila, Gregorio L.
    Type: Article
    In: The journal of raptor research
    Volume: 36
    Issue: 1
    Date: 2002
    Page Range: 77--81
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Baker, Aaron J - Whitacre, David F. (David Frederick) - Aguirre-Barrera, Oscar A. - López Ávila, Juventino. - White, Clayton M.
    Type: Article
    In: The journal of raptor research
    Volume: 33
    Issue: 4
    Date: 1999
    Page Range: 343--344
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-