@INBOOK {NG:1988, title = {The genebank at IITA and its significance for crop improvement in Africa with special reference to cowpea germplasm, edited by Engels, J.M.M.}, author = {Ng, N. Q. }, year = {1988}, type = {The Conservation and Utilization of Ethiopian Germplasm}, pages = {302--321}, publisher = {Plant Genetic Resource Center}, address = {Ethiopia}, }