na INLIS000000000002843 Ind 0010-1118002843 A variance components approach to food grain market integration in Northern Nigeria DELGADO, Christophen L. Christophen L. Delgado Reprint from : American J. of Agric. Econ. 68(4), Nov. 1986 : [970]-979 633.1 GRAIN CROPS MARKET PRICES NIGERIA mfn-4525