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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Bemis, W. P. - Whitaker, Thomas W. (Thomas Wallace),
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 18
    Date: 1965
    Page Range: 39--47
    Publication Info: Berkeley, California Botanical Society,
  2. By: Bemis, W. P. - Whitaker, Thomas W. (Thomas Wallace),
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 20
    Date: 1969
    Page Range: 33--41
    Publication Info: Berkeley, California Botanical Society,