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  1. By: Negro, J J - Bustamante, Javier - Melguizo, C - Ruiz, J L - Grande, Juan Manuel
    Type: Article
    In: The journal of raptor research
    Volume: 34
    Issue: 4
    Date: 2000
    Page Range: 327--329
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-