@ARTICLE {LAWSON:1982c, title = {Methodology of farming systems research: enviromental descriptions and resources evaluation}, author = {Lawson, T. L. and Juo, A. S. R. and Ay, P. }, journal = {Paper presented at National Workshop on Farming Systems Research,}, year = {1982}, note = {30 July-6 August 1982, Benin City}, }