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  1. By: Kaltenecker, G S - Bechard, Marc J
    Type: Article
    In: The journal of raptor research
    Volume: 28
    Issue: 1
    Date: 1994
    Page Range: 59--59
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Yosef, Reuven - Fornasari, Lorenzo - Tryjanowski, Piotr - Bechard, Marc J - Kaltenecker, G S - Bildstein, Keith L. (Keith Louis),
    Type: Article
    In: The journal of raptor research
    Volume: 37
    Issue: 1
    Date: 2003
    Page Range: 31--36
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  3. By: Kaltenecker, G S - Steenhof, K - Bechard, Marc J - Munger, James C.
    Type: Article
    In: The journal of raptor research
    Volume: 32
    Issue: 3
    Date: 1998
    Page Range: 215--220
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-