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  1. By: Zuberogoitia Arroyo, Iñigo‏ - Martinez, Jose Antonio - Azkona, Ainara - Iraeta, A - Castillo, Iñaki - Alonso, Raúl. - Hidalgo, S
    Type: Article
    In: The journal of raptor research
    Volume: 37
    Issue: 4
    Date: 2003
    Page Range: 342--344
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-