TY - GEN AU - Evenson, Robert E. AU - Gollin, Douglas. CN - SB185.7 CY - Wallingford, Oxon, UK ; CY - Cambridge, MA, USA : DA - c2003. ID - 411903 KW - Field crops KW - Field crops KW - Crop improvement. KW - Agriculture KW - Agricultural productivity. LK - https://univsouthin.idm.oclc.org/login?url=http://site.ebrary.com/lib/usiricelib/Doc?id=10173518 PB - CABI Pub., PP - Wallingford, Oxon, UK ; PP - Cambridge, MA, USA : PY - c2003. T1 - Crop variety improvement and its effect on productivitythe impact of international agricultural research / TI - Crop variety improvement and its effect on productivitythe impact of international agricultural research / UR - https://univsouthin.idm.oclc.org/login?url=http://site.ebrary.com/lib/usiricelib/Doc?id=10173518 ER -