Credits: Biovision-Infonet
- AIC Documentation Unit, Kenya
- Russell, K. (1980). The Principles of Dairy Farming. Farming Press Ltd., 8th edition, UK. ISBN 0 85236 106 8
- Central Artificial Insemination Service.
- Kenya Stud Book (Breeding Organisation): www.klbo.co.ke Email: kenman@yahoo.com, P.O. Box 478 NAKURU. Contact person Geoffrey Mwangi Manager KLBO. Phone +254 733876335.