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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Mangelsdorf, Paul C - Cameron, James W.
    Type: Article
    In: Botanical Museum leaflets, Harvard University
    Volume: 10
    Issue: 8
    Date: 1942-08-21
    Page Range: 217--252
    Publication Info: Cambridge, Mass Botanical Museum, Harvard University 1932-