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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Jackson, Violet G.
    Type: Article
    In: Annals of botany
    Volume: 36
    Date: 1922-01
    Page Range: 21--39
    Publication Info: London, Academic Press [etc.],
  2. By: Brenchley, Winifred E. (Winifred Elsie), - Jackson, Violet G.
    Type: Article
    In: Annals of botany
    Volume: 35
    Date: 1921-10
    Page Range: 533--556
    Publication Info: London, Academic Press [etc.],