@INBOOK {NG:1990b, title = {Recents developments in cowpea germplasm collection, conservation, evaluation and research at the Genetic Resources Unit}, author = {Ng, N. Q. }, year = {1990}, type = {Cowpea genetic resources, edited by N.Q. Ng and L.M. Monti}, pages = {13--28}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, }