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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Spear, Ray W - Miller, Norton G. (Norton George),
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 57
    Issue: 3
    Date: 1976
    Page Range: 369--403
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-