Swai E S , Karimuribo E D, Kyakaisho P F and Mtui P F 2007: Free-range village chickens on the humid coastal belt of Tanga, Tanzania: their roles, husbandry and health status. Livestock Research for Rural Development. Volume 19, Article #104. Retrieved , from http://www.lrrd.org/lrrd19/8/swai19104.htm