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  1. By: Howard, Richard A. (Richard Alden), - Portecop, Jacques - De Montaignac, Pierre
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 61
    Issue: 4
    Date: 1980
    Page Range: 749--764
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-