@ARTICLE {GEBREMESKEL:1987b, title = {Sweet Potato in Africa and World: Trends of Vital Statistics}, author = {Gebremeskel, T. and Oyewole, B. }, journal = {IITA Socio-Economic Unit, Ibadan}, year = {1987}, pages = {55 pp}, note = {RTB; Root and Tuber; Sweetpotato}, }