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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Wetmore, Ralph H. (Ralph Hartley), - Sorokin, Sergei
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 36
    Issue: 2-3
    Date: 1955
    Page Range: 305--317
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-