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By: Dahl, A OrvilleType: ArticleIn: Journal of the Arnold ArboretumVolume: 33Series:Issue: 3Date: 1952Page Range: 252--295Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-Subjects:
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By: Dahl, A OrvilleType: ArticleIn: Journal of the Arnold ArboretumVolume: 36Series:Issue: 2-3Date: 1955Page Range: 159--164Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-Subjects:
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By: Dahl, A Orville - Rowley, John RType: ArticleIn: Journal of the Arnold ArboretumVolume: 46Series:Issue: 3Date: 1965Page Range: 308--323Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-Subjects: