@BOOK {NWEKE:1988g, title = {Cropping systems and agroeconomic performance of improved cassava in a humid forest ecosystem: RCMP Research monograph, No. 2}, author = {Nweke, F. and Ezumah, H. C. and Spencer, D. }, series = {RCMP Research monograph, No. 2}, year = {1988}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {45p.}, }