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  1. By: Wheeler, Elisabeth Field - Scott, Richard A - Barghoorn, Elso S. (Elso Sterrenberg),
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 58
    Issue: 3
    Date: 1977
    Page Range: 280--306
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-
  2. By: Wheeler, Elisabeth Field - Scott, Richard A - Barghoorn, Elso S. (Elso Sterrenberg),
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 59
    Issue: 1
    Date: 1978
    Page Range: 1--31
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-