Safari J, Mtenga L A, Eik L O, Sundstøl F and Johnsen F H 2008: Analysis of three goat production systems and their contribution to food security in semiarid areas of Morogoro, Tanzania. Livestock Research for Rural Development. Volume 20, Article #74. Retrieved , from http://www.lrrd.org/lrrd20/5/safa20074.htm