1. Ali, M. and de Castro, J. J., 1993. Host resistance to ticks (Acari: Ixodidae) in different breeds of cattle at Bako, Ethiopia, Tropical Animal Health and Production, 25, 215-222.
2. Asfaw, W., 1997. Country Report: Ethiopia. In: Proceedings of a Seminar on Livestock Development Policies in Eastern and Southern Africa, 28 July-1August, 1997, Mbabany, Organized By CTA, OAU/IBAR and The Ministry of Agriculture and Cooperative, Swaziland.
3. Central Statistical Agency 2007. Compilation of Economic Statistics in Ethiopia. Addis Ababa, Ethiopia. pp. 1-10.
4. Central Statistical Agency 2008a. Agricultural Sample Enumeration 2001-2002 (1994 E.C.): Livestock. Central Statistical Agency of Ethiopia (Ministry of Finance and Economic Development), September 2008, Addis Ababa, Ethiopia. Retrieved 19th 320 February 2010 from http://www.csa.gov.et/nada1/ddibrowser .
5. Central Statistical Agency 2008b. Agricultural Sample Survey 2007-08 (2000 E.C.): Volume II. Report on Livestock and livestock characteristics (private peasant holdings).Statistical Bulletin 417, Addis Ababa, Ethiopia. 188p.