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  1. By: Garber, Christopher S. - Wallen, Richard L. - Duffy, Katharine
    Type: Article
    In: The journal of raptor research
    Volume: 25
    Issue: 4
    Date: 1991
    Page Range: 120--122
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Garber, Christopher S. - Mutch, B D - Platt, S
    Type: Article
    In: The journal of raptor research
    Volume: 27
    Issue: 3
    Date: 1993
    Page Range: 169--171
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-