@ARTICLE {IBANA:2012, title = {Economic analysis of commercial seed yam production systems in the Sub-humid ecologies of the river Niger}, author = {Ibana, S. * and Coyne, D. and Claudius-Cole, A. O. * and McNamara, N. and Morse, S. }, journal = {Journal of Crop Improvement}, year = {2012}, volume = {26}, number = {1}, pages = {22--28}, issn = {1542-7528}, note = {RTB; Root and Tuber; Yam}, doi = {10.1080/15427528.2011.609584}, }