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  1. By: Gonzalez, J L - Heredia, B - Gonzalez, Luis M. - Alonso, J C
    Type: Article
    In: Raptor research
    Volume: 20
    Issue: 2
    Date: 1986
    Page Range: 77--78
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]
  2. By: Heredia, B - Clark, William S.
    Type: Article
    In: Raptor research
    Volume: 18
    Issue: 1
    Date: 1984
    Page Range: 30--31
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]