@INBOOK {ASADU:1988, title = {The performance of six cultivars of white yam derived from three sources and evaluated across three zones in southern Nigeria}, author = {Asadu, C. * and Ezumah, H. C. and Nweke, F. and Akammigbo, F. O. }, year = {1988}, type = {Cassava-based systems research 1}, pages = {214--224}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {RTB; Root and Tuber; Yam}, }