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  1. By: De Solla, S R - Martin, P A - Ewins, P J - Barker, Michael E.
    Type: Article
    In: The journal of raptor research
    Volume: 37
    Issue: 4
    Date: 2003
    Page Range: 307--314
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-