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  1. By: Bildstein, Keith L. (Keith Louis), - Schelsky, Wendy - Zalles, Jorje I. - Ellis, Susie
    Type: Article
    In: The journal of raptor research
    Volume: 32
    Issue: 1
    Date: 1998
    Page Range: 3--18
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-