@BOOKLET {ALENE:2005c, title = {The impact of IITA-led biological control of major pests in sub-Saharan African agriculture: a synthesis of milestones and empirical results}, author = {Alene, A. and Neuenschwander, P. and Manyong, V. and Coulibaly, O. and Hanna, R. }, year = {2005}, address = {Ibadan, Nigeria}, howpublished = {Impact series}, note = {26p.; Impact series}, }