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Technical Bulletin

United States. Agricultural Research ServiceAnselm Clyde GriffinArthur Herbert BennettArvin L. LivingstonFrank J. SiccardiGeorge Albert RoglerGuy Weston BohnJohn Albert RombergerOtto L. JahnPhilip F. RicePreston Edward LaFerneyRalph W. Baird

出版	U.S. Agricultural Research Service, 1969
URL	http://books.google.com.hk/books?id=aGDWWyI9wOIC&hl=&source=gbs_api