@BOOK {OKIKE:2001, title = {Agricultural intensification and efficiency in the west African savannas: evidence from northern Nigeria}, author = {Okike, I. and Jabbar, M. and Manyong, V. and Smith, J. and Akinkunmi, J. and Ehiu, S. }, series = {Socio-economic and Policy Research Working Paper 33}, year = {2001}, publisher = {International Livestock Research Institute (ILRI)}, address = {Nairobi, Kenya}, isbn = {92-9146-096-6}, note = {EAHub; 54p.}, }