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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Martell, M - Redig, P - Nibe, J - Buhl, Gail - Franzel, Daniel
    Type: Article
    In: The journal of raptor research
    Volume: 25
    Issue: 3
    Date: 1991
    Page Range: 72--76
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-