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  1. By: Howard, Richard A. (Richard Alden), - Vining, Donald M. - DeWolf, Gordon P. Jr. - Wheeler, Ralph E.
    Type: Article
    In: Arnoldia
    Volume: 32
    Issue: 4
    Date: 1972
    Page Range: 168--172
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University
  2. By: Wheeler, Ralph E.
    Type: Article
    In: Arnoldia
    Volume: 34
    Issue: 1
    Date: 1974
    Page Range: 12--21
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University
  3. By: Wyman, Donald - Pride, George H. - Vining, Donald M. - DeWolf, Gordon P. Jr. - Wheeler, Ralph E.
    Type: Article
    In: Arnoldia
    Volume: 32
    Issue: 6
    Date: 1972
    Page Range: 292--294
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University