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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Heimberger, Marianne - Euler, David - Barr, Jack
    Type: Article
    In: The Wilson bulletin
    Volume: 95
    Issue: 3
    Date: 1983
    Page Range: 431--439
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-