@ARTICLE {ADO:2002, title = {Release of two new extra-early maize varieties Sammaz 12 and Sammaz 13 by IAR, Samaru}, author = {Ado, S. and Badu-Apraku, B. and Kling, J. and Menkir, A. }, journal = {Samaru Journal of Agricultural Research}, year = {2002}, volume = {18}, pages = {91}, }