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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Douglas, David C. - Ratti, John T - Black, R. Alan. - Alldredge, J. Richard
    Type: Article
    In: The Wilson bulletin
    Volume: 104
    Issue: 3
    Date: 1992
    Page Range: 485--500
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-