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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Swanson, David L - Liknes, Eric T - Dean, Kurtis L.
    Type: Article
    In: The Wilson bulletin
    Volume: 111
    Issue: 1
    Date: 1999
    Page Range: 61--69
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-