@BOOKLET {DUGJE:2008c, title = {Guide to certified seeds production in Borno State, Nigeria}, author = {Dugje, I. * and Onyibe, J. E. * and Ekeleme, F. and Kamara, A. and Tegbaru, A. and Omoigui, L. and Bassi, S. A. }, year = {2008}, address = {International Institute of Tropical Agriculture (IITA)}, note = {iii, 16p ISBN 978 131 325 0}, }