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  1. By: Zuberogoitia Arroyo, Iñigo‏ - Martinez, Jose Antonio - Zabala, Jabi - Martinez, Jose Enrique
    Type: Article
    In: The journal of raptor research
    Volume: 39
    Issue: 2
    Date: 2005
    Page Range: 156--159
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-