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  1. By: Lockwood, Tom E
    Type: Article
    In: Botanical Museum leaflets, Harvard University
    Volume: 23
    Issue: 6
    Date: 1973-06-15
    Page Range: 273--284
    Publication Info: Cambridge, Mass Botanical Museum, Harvard University 1932-
  2. By: Schultes, Richard Evans, - Klein, William M - Plowman, Timothy, - Lockwood, Tom E
    Type: Article
    In: Botanical Museum leaflets, Harvard University
    Volume: 23
    Issue: 9
    Date: 1974-02-28
    Page Range: 337--367
    Publication Info: Cambridge, Mass Botanical Museum, Harvard University 1932-