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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Cooper-Driver, Gillian A. - Balick, Michael J
    Type: Article
    In: Botanical Museum leaflets, Harvard University
    Volume: 26
    Issue: 8
    Date: 1978
    Page Range: 257--275
    Publication Info: Cambridge, Mass Botanical Museum, Harvard University 1932-
  2. By: Cooper-Driver, Gillian A.
    Type: Article
    In: Arnoldia
    Volume: 54
    Issue: 2
    Date: 1994
    Page Range: 2--10
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University