@MISC {BEED:2013c, title = {Maize based cropping systems?}, author = {Beed, F. and Menkir, A. }, year = {2013}, month = {May}, howpublished = {Poster presented at the inauguration of science building, IITA regional hub Tanzania, 13th May, 2013}, note = {Inauguration by current and former presidents of Tanzania accompanied by Chief Olusegun Obasanjo, former President of the Republic of Nigeria}, }