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  1. By: Williams, Robert G. - Fordham, Alfred J.
    Type: Article
    In: Arnoldia
    Volume: 13
    Issue: 11-12
    Date: 1953
    Page Range: 69--84
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University
  2. By: Williams, Robert G.
    Type: Article
    In: Arnoldia
    Volume: 19
    Issue: 1-2
    Date: 1959
    Page Range: 1--10
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University
  3. By: Trowbridge, Elinore B. - Williams, Robert G.
    Type: Article
    In: Arnoldia
    Volume: 35
    Issue: 6
    Date: 1975
    Page Range: 296--296
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University
  4. By: Reynolds, Margo W. - Howard, Richard A. (Richard Alden), - Wadleigh, Jeanne S. - Williams, Robert G. - Warren, Richard - Brailey, Allen
    Type: Review
    In: Arnoldia
    Volume: 36
    Issue: 3
    Date: 1976
    Page Range: 125--128
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University