@PROCEEDINGS {LAWSON:1979,
title = {Climate and soil conditions in semi-arid regions of West Africa with special reference to maize production},
author = {Lawson, T. L. and Juo, A. S. R. },
booktitle = {First SAFGRAD Maize Workshop, Ouagadougou, February 20-23,1979},
year = {1979},
month = {February},
}