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By: Mangelsdorf, Paul C - Barghoorn, Elso S. (Elso Sterrenberg), - Banerjee, Umesh CType: ArticleIn: Botanical Museum leaflets, Harvard UniversityVolume: 26Series:Issue: 7Date: 1978-10-30Page Range: 237--255Publication Info: Cambridge, Mass Botanical Museum, Harvard University 1932-Subjects: