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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Rohrbaugh, Ronald W - Yahner, Richard H. (Richard Howard)
    Type: Article
    In: The Wilson bulletin
    Volume: 109
    Issue: 3
    Date: 1997
    Page Range: 410--423
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-