@INBOOK {MANYONG:2003, title = {Impact of IITA germplasm improvement on maize production in West and Central Africa}, author = {Manyong, V. and Kling, J. and Makinde, K. and Ajala, S. and Menkir, A. }, year = {2003}, type = {Crop improvement and its effect on productivity: the impact of international agricultural research}, pages = {159--181}, chapter = {8}, publisher = {CABI}, address = {Wallingford, UK}, isbn = {0-85199-549-7}, }