@BOOK {IITA:2010e, title = {R4D Review; 4}, author = {IITA, }, editor = {Lopez, K. and Bramel, P. and Asiedu, R. and Chikoye, D. and Manyong, V. }, year = {2010}, month = {March}, edition = {4}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {ISSN: 2071-3681}, url = {www.r4dreview.org}, }