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  1. By: Bennetts, Robert E - McClelland, B. Riley
    Type: Article
    In: The Wilson bulletin
    Volume: 109
    Issue: 3
    Date: 1997
    Page Range: 393--409
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Yates, Richard E - McClelland, B. Riley - Mcclelland, P T - Key, Carl H - Bennetts, Robert E
    Type: Article
    In: The journal of raptor research
    Volume: 35
    Issue: 2
    Date: 2001
    Page Range: 81--90
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  3. By: Valentine-Darby, Patricia L. - Bennetts, Robert E - Kitchens, W M
    Type: Article
    In: The journal of raptor research
    Volume: 32
    Issue: 2
    Date: 1998
    Page Range: 98--103
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-