@ARTICLE {WILSON:1982c, title = {Basis for defining benchmark areas and type of research to be undertaken in West Africa}, author = {Wilson, G. F. and Lawson, T. L. and Kang, B. T. }, journal = {Paper presented at 1st Workshop of West African Farming System Research Network, 15-20 November 1982, IITA, Ibadan}, year = {1982}, }