@INBOOK {SINGH:2002c, title = {Recent progress in cowpea breeding}, author = {Singh, B. and Ehlers, J. D. and Sharma, B. and Filho, F. }, year = {2002}, type = {Challenges and opportunities for enhancing sustainable cowpea production:}, pages = {22--40}, note = {Proceedings of the World Cowpea Conference III held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 4-8 September 2000}, }