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  1. By: Vestal, Paul Anthony,‏ ‎ - Vestal, Mary R
    Type: Article
    In: Botanical Museum leaflets, Harvard University
    Volume: 8
    Issue: 9
    Date: 1940-08-02
    Page Range: 169--180
    Publication Info: Cambridge, Mass Botanical Museum, Harvard University 1932-
  2. By: Bailey, Irving W. (Irving Widmer), - Vestal, Mary R
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 18
    Issue: 3
    Date: 1937
    Page Range: 185--195
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-
  3. By: Bailey, Irving W. (Irving Widmer), - Vestal, Mary R
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 18
    Issue: 3
    Date: 1937
    Page Range: 196--205
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-