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  1. By: Copeland, Harold W.
    Type: Article
    In: Arnoldia
    Volume: 23
    Issue: 7
    Date: 1963
    Page Range: 103--106
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University
  2. By: Copeland, Harold W.
    Type: Article
    In: Arnoldia
    Volume: 21
    Issue: 11
    Date: 1961
    Page Range: 67--73
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University