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Soybeans and Cowpeas in Illinois

University of Illinois (Urbana-Champaign campus). Agricultural Experiment StationW. L. BurlisonO. M. Allyn

出版	University of Illinois, Agricultural Experiment Station, 1917
URL	http://books.google.com.hk/books?id=JuiqcQAACAAJ&hl=&source=gbs_api