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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Gerhardt, Richard P - Gerhardt, Dawn M - Vasquez, Miguel Angel
    Type: Article
    In: The Wilson bulletin
    Volume: 109
    Issue: 1
    Date: 1997
    Page Range: 112--120
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-