A participatory rapid appraisal of farming systems in western Kenya - Waithaka, M.M.; Wokabi, A.; Nyangaga, J.; Ouma, Emily A.; Wolff, T. de; Biwott, J.; Staal, Steven J.; Ojowi, M.; Ogidi, R.; Njarro, I.; Mudavadi, P. (Smallholder Dairy Project, 2000)