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Research Bulletin

H. F. LongHenry GieseJay Laurence LushJesse Jarue MarkM. B. MichaelianRainer SchickeleRudger Harper WalkerBernard Wernick HammerJay Brownlee DavidsonPercy Edgar BrownHenry J. Barre

出版	Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts, 1936
URL	http://books.google.com.hk/books?id=FcpQAQAAMAAJ&hl=&source=gbs_api