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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Smith, Robert W - Brown, Irene L - Mewaldt, L Richard
    Type: Article
    In: The Wilson bulletin
    Volume: 81
    Issue: 4
    Date: 1969
    Page Range: 419--440
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-