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  1. By: Carrete, Martina - Sánchez-Zapata, José Antonio - Calvo, José F.
    Type: Article
    In: The journal of raptor research
    Volume: 34
    Issue: 1
    Date: 2000
    Page Range: 48--52
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Martinez, J E - Gonzalez, C - Calvo, José F.
    Type: Article
    In: The journal of raptor research
    Volume: 39
    Issue: 1
    Date: 2005
    Page Range: 92--94
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  3. By: Martinez, J E - Calvo, José F.
    Type: Article
    In: The journal of raptor research
    Volume: 35
    Issue: 3
    Date: 2001
    Page Range: 259--262
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  4. By: Sánchez-Zapata, José Antonio - Calvo, José F.
    Type: Article
    In: The journal of raptor research
    Volume: 32
    Issue: 3
    Date: 1998
    Page Range: 254--256
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  5. By: Martinez, J E - Calvo, José F.
    Type: Article
    In: The journal of raptor research
    Volume: 39
    Issue: 2
    Date: 2005
    Page Range: 159--163
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-