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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Schadel, William E - Dickison, William C
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 60
    Issue: 1
    Date: 1979
    Page Range: 8--37
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-