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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Nagel, Lillian
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 33
    Date: 1946
    Page Range: 249--289
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  2. By: Nagel, Lillian
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 26
    Date: 1939
    Page Range: 349--372
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-