@BOOK {SANGINGA:1999a, title = {Social impact of soybean in Nigeria's southern Guinea savanna}, author = {Sanginga, P. and Adesina, A. and Manyong, V. and Otite, O. * and Dashiell, K. }, series = {Impact series}, year = {1999}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, isbn = {978 131 168 1}, note = {34p.; Impact series}, }