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  1. By: Franklin, Alan B - Ward, J. P.
    Type: Article
    In: The journal of raptor research
    Volume: 27
    Issue: 1
    Date: 1993
    Page Range: 55--55
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Ward, J. P. - Duncan, Russell B. - Seamans, M E - Olson, D R - Ganey, Joseph L - Block, William M. - Willey, David W. - Johnson, C - Reynolds, Richard T. - Derosier, S B - Rinkevich, S E - Tarango Arámbula, Luis Antonio
    Type: Article
    In: The journal of raptor research
    Volume: 29
    Issue: 1
    Date: 1995
    Page Range: 48--48
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-