Mitchell, Donald O. Factors affecting grains, 1970-84 / Donald O. Mitchell - Washington, DC : World Bank (WB) , 1987 - iv, 31p. : ill. ; 28 cm. - Working paper (World Bank. International Commodity Markets Division), no. 1987-10 . Includes bibliographical references. Subjects--Topical Terms: Grain Gov. Doc. Class. No.: UN WB IED ICMD WP-1987-10