Swai E S, Karimuribo E D, Schoonman L, French N P, Fitzpatrick J, Kambarage D and Bryant M J  2005: Description, socio-economic characteristics, disease managements and mortality dynamics in smallholder's dairy production system in coastal humid region of Tanga, Tanzania. Livestock Research for Rural Development. Volume 17, Article #41. Retrieved , from http://www.lrrd.org/lrrd17/4/swa17041.htm