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  1. By: Rohner, C - Doyle, F I
    Type: Article
    In: The journal of raptor research
    Volume: 26
    Issue: 4
    Date: 1992
    Page Range: 261--263
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Rohner, C - Doyle, F I
    Type: Article
    In: The journal of raptor research
    Volume: 26
    Issue: 1
    Date: 1992
    Page Range: 33--35
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  3. By: Doyle, F I
    Type: Article
    In: The Canadian field-naturalist
    Volume: 109
    Issue: 1
    Date: 1995
    Page Range: 115--116
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. By: Doyle, F I
    Type: Article
    In: The journal of raptor research
    Volume: 30
    Issue: 1
    Date: 1996
    Page Range: 38--40
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  5. By: Mahon, T - Doyle, F I
    Type: Article
    In: The journal of raptor research
    Volume: 39
    Issue: 3
    Date: 2005
    Page Range: 335--341
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-