@BOOK {ADESINA:1999, title = {Policy shifts and adoption of alley farming in West and Central Africa}, author = {Adesina, A. and Coulibaly, O. and Manyong, V. and Sanginga, N. and Mbila, D. and Chianu, J. and Kamleu, D. G. }, series = {Impact series}, year = {1999}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, isbn = {978 131 170 3}, note = {21p.; Impact series}, }