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  1. By: Morgan, George R
    Type: Article
    In: Botanical Museum leaflets, Harvard University
    Volume: 29
    Issue: 2
    Date: 1983-11-09
    Page Range: 73--86
    Publication Info: Cambridge, Mass Botanical Museum, Harvard University 1932-
  2. By: Morgan, George R
    Type: Article
    In: Botanical Museum leaflets, Harvard University
    Volume: 28
    Issue: 3
    Date: 1980-09
    Page Range: 235--246
    Publication Info: Cambridge, Mass Botanical Museum, Harvard University 1932-