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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Stidd, Benton M
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 61
    Date: 1974
    Page Range: 388--407
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  2. By: Hall, John W., - Stidd, Benton M
    Type: Article
    In: Palaeontology
    Volume: 14
    Date: 1971
    Page Range: 431--436
    Publication Info: London, Palaeontological Association, 1957-