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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Clark, Kathleen A. - Anderson, Stanley H.
    Type: Article
    In: The journal of raptor research
    Volume: 31
    Issue: 4
    Date: 1997
    Page Range: 358--363
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-