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Proceedings of the International Soil Tillage Research Organization [sic], ISTRO, (8th Conference), 1979, University of Hohenheim

International Soil Tillage Research OrganizationInternational Soil Tillage Research Organization. Conference

出版	University of Hohenheim, 1979
URL	http://books.google.com.hk/books?id=ImoTMQAACAAJ&hl=&source=gbs_api