@INBOOK {KRISTJANSON:2002, title = {Evaluating adoption to new crop-livestock-soil management technologies using georeferenced village-level data: the case of cowpea in the dry savannas of West Africa}, author = {Kristjanson, P. and Okike, I. and Tarawali, S. and Kruska, R. and Manyong, V. and Singh, B. }, editor = {Barret, C. B and Place, F. and Aboud, A}, year = {2002}, type = {Natural resources managment in African agriculture}, pages = {169--180}, publisher = {CABI}, address = {Wallingford, UK}, }