@INPROCEEDINGS {SINGH:2005b, title = {Improved cowpea-based cropping systems for sustainable increase in food production and income generation in West Africa}, author = {Singh, B. and Ezeaku, I. and Mohammed, I. B. }, booktitle = {The 4th World Cowpea Conference, April 17-22, Durban, South Africa}, year = {2005}, publisher = {N/A}, }