@BOOK {NWEKE:1996, title = {Spread and performance of improved cassava varieties in Nigeria}, author = {Nweke, F. and Ugwu, B. and Dixon, A. }, series = {COSCA working paper}, year = {1996}, number = {15}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, isbn = {978-131-106-1}, note = {RTB; Root and Tuber; Cassava.; 34p. File is too large to upload- table of content attached}, }