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  1. By: Collins, Henry B. (Henry Bascom), - Clark, Austin Hobart, - Walker, Egbert H. (Egbert Hamilton),‏ ‎
    Publication info: City of Washington, Smithsonian Institution, 1945
    Holding Institution: Smithsonian Libraries and Archives
  2. By: Oi, Jisaburo, - Meyer, Frederick G, - Meyer, Frederick G. - Walker, Egbert H. (Egbert Hamilton),‏ ‎ - Walker, Egbert H. (Egbert Hamilton),‏ ‎
    Publication info: Washington, Smithsonian Institution, 1965
    Holding Institution: Smithsonian Libraries and Archives
  1. By: Walker, Egbert H. (Egbert Hamilton),‏ ‎
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 23
    Issue: 3
    Date: 1942
    Page Range: 344--355
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-
  2. By: Walker, Egbert H. (Egbert Hamilton),‏ ‎
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 25
    Issue: 3
    Date: 1944
    Page Range: 319--341
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-