@BOOK {IITA:2012, title = {R4D Review; 8}, author = {IITA, }, editor = {Kumar, P. L. and Lopez, K. }, year = {2012}, month = {March}, edition = {8}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, isbn = {ISSN: 2071-3681}, url = {www.r4dreview.org}, }