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