@ARTICLE {AJEIGBE:2006b, title = {Comparative assessment of yield potentials of improved cowpea breeding lines using performance index and ranking methods}, author = {Ajeigbe, H. and Mohammed, S. * and Singh, B. }, journal = {Journal of Food, Agriculture and Environment}, year = {2006}, volume = {4}, number = {3 & 4}, pages = {95--98}, }