@ARTICLE {HAHN:1987b, title = {Yam production and its future prospects}, author = {Hahn, S. K. and Osiru, D. * and Akoroda, M. and Otoo, J. }, journal = {Outlook on Agriculture}, year = {1987}, volume = {16}, pages = {105--110}, note = {RTB; Root and Tuber; Yam}, }