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  1. By: Tingay, Ruth E - Clarke, M L - Watson, Richard T. - Thorstrom, Russell - Kalavah, Loukman
    Type: Article
    In: The journal of raptor research
    Volume: 38
    Issue: 1
    Date: 2004
    Page Range: 85--88
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-