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By: Hans, A SType: ArticleIn: Journal of the Arnold ArboretumVolume: 51Series:Issue: 4Date: 1970Page Range: 534-539Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-Subjects:
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By: Hans, A SType: ArticleIn: Journal of the Arnold ArboretumVolume: 53Series:Issue: 2Date: 1972Page Range: 216--225Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-Subjects: