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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Johnson, G T - Peck, Ruth E
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 24
    Date: 1937
    Page Range: 161--174
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  2. By: Schmitt, Francis Otto, - Johnson, G T
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 25
    Date: 1938
    Page Range: 455--466
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-