Kanuya, N.L., J.F. Agger, and K.M. Pedersen. 1997. “Assessing The Reproductive Performance of a Tanzanian Dairy Herd: The Importance of Proper Record Keeping”. Tanzania Veterinary Journal 17 (3):63-71. https://tvj2.sua.ac.tz/vet2/index.php/TVJ/article/view/474.