@INPROCEEDINGS {MANYONG:1998, title = {Spread of new soybean varieties in a traditional soybean growing area of Nigeria}, author = {Manyong, V. and Dashiell, K. and Oyewole, B. and Blahut, G. }, editor = {Bezuneh, T. and Ouedraogo, S. and Menyonga, J. M. and Zongo, J. D. and Ouedraogo, M. }, booktitle = {Towards sustainable farming systems in sub-Saharan Africa: proceedings of the second international symposium of the African Association of Farming Systems Research, Extension and Training (AAFSRET), Ouagadougou, Burkina Faso, 21–23 August 1996}, year = {1998}, pages = {151--162}, publisher = {AAFSRET}, address = {Ouagadougou, Burkina Faso}, }