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By: Ames, Oakes, - Schweinfurth, CType: ArticleIn: Proceedings of the Biological Society of WashingtonVolume: 43Series:Issue:Date: 1930Page Range: 195--196Publication Info: Washington Biological Society of WashingtonSubjects:
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By: Schweinfurth, CType: ArticleIn: Journal of the Arnold ArboretumVolume: 10Series:Issue: 3Date: 1929Page Range: 169--174Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-Subjects: