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  1. By: Gwiazdowicz, Dariusz J., - Mizera, Tadeusz, - Skorupski, M
    Type: Article
    In: The journal of raptor research
    Volume: 33
    Issue: 3
    Date: 1999
    Page Range: 257--260
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Wacławek, Krzysztof - Mizera, Tadeusz,
    Type: Article
    In: The journal of raptor research
    Volume: 36
    Issue: 1
    Date: 2002
    Page Range: 25--28
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  3. By: Meyburg, Bernd-U - Meyburg, Christiane - Mizera, Tadeusz, - Maciorowski, Grzegorz - Kowalski, Jan
    Type: Article
    In: The journal of raptor research
    Volume: 39
    Issue: 4
    Date: 2005
    Page Range: 462--466
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-