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Co-operative Tobacco Investigations of the Bureau of Plant Industry, U.S. Department of Agriculture, and the Virginia Experiment Station, Progress of the Experiments

Ernest H. MathewsonBernard Guthrie AndersonRandolph Preston Cocke

出版	Virginia Agricultural Experiment Station, 1908
URL	http://books.google.com.hk/books?id=RAQnAQAAMAAJ&hl=&source=gbs_api