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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Philipson, W R - Philipson, M N
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 49
    Issue: 2
    Date: 1968
    Page Range: 193--224
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-