@BOOKLET {MANYONG:2011a, title = {Outcome and impact assessment at IITA: issues and evidence}, editor = {Manyong, V. and Alene, A. and Rusike, J. and Abdoulaye, T. }, year = {2011}, howpublished = {Proceedings (Booklet)}, note = {Proceedings of a mini-symposium on outcome and impact assessment at IITA, 24 November 2010. ISBN: 978-978-50368-7-9. 23p.}, }