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By: Young, Robert A. (Robert Armstrong),Edition:Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1923Volume: no.1167 (1923)Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections:
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By: Young, Robert A. (Robert Armstrong),Edition:Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1924Volume: no.1247 (1924)Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections:
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By: Young, Robert A. (Robert Armstrong),Type: ArticleIn: ArnoldiaVolume: 6Series:Issue: 7-9Date: 1946Page Range: 29--43Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard UniversitySubjects:
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By: Young, Robert A. (Robert Armstrong),Type: ArticleIn: Journal of the New York Botanical GardenVolume: 14Series:Issue: 166Date: 1913-10Page Range: 167--171Publication Info: Lancaster, Pa Published for the Garden by the New Era Printing Co 1900-Subjects: