@BOOK {NWEKE:1994, title = {Cassava distribution in sub-Saharan Africa: COSCA working paper, No. 12}, author = {Nweke, F. }, series = {COSCA working paper}, year = {1994}, number = {12}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {RTB; Root and Tuber; Cassava.; 38p.}, }