@BOOK {MIGNOUNA:2016a, title = {Impact evaluation protocols for agricultural projects: the case of Yam Improvement for Income and Food Security in West Africa; YIIFSWA working paper series, No. 7}, author = {Mignouna, D. and Akinola, A. and Abdoulaye, T. and Alene, A. and Maroya, N. and Aighewi, B. and Wobill, T. and Asiedu, R. }, series = {YIIFSWA working paper series}, year = {2016}, publisher = {International Institute of Tropical Agriculture}, address = {Ibadan, Nigeria}, isbn = {978-978-8444-67-1}, note = {WAHub; RTB; Yam; 77p.}, }