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Potential Production of Soybeans in North Central India

Sheldon W. WilliamsWilliam E. HendrixMatthias von Oppen

出版	College of Agriculture, University of Illinois at Urbana-Champaign, 1974
URL	http://books.google.com.hk/books?id=DpCOJSnJ8jYC&hl=&source=gbs_api