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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Heinrich, Bernd
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 68
    Date: 1981
    Page Range: 370--378
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  2. By: Heinrich, Bernd
    Type: Article
    In: The Wilson bulletin
    Volume: 115
    Issue: 2
    Date: 2003
    Page Range: 113--114
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-