1. Campos, M. S., Wilcox, C. J., Becerril, C. M. &Diz, A. (1994). Genetic parameters for yield and reproductive traits of Holstein and Jersey cattle in Florida.Journal of Dairy Science,77, 867–873.
2. Cunningham, E. P. & Syrstad, O. (1987). CrossbreedingBos indicus andBos taurus for production in tropics. FAO Animal Production and Health Paper No. 68.
3. Jaetzold, R. &Schmidt, H. (1983).Farm Management Handbook of Kenya. Vol. II. Natural Conditions and Farm Management Information—Part B Central Kenya. Ministry of Agriculture, Kenya.
4. Katyega, P. M. J. (1988). Performance of Jerseys on the slopes of Mount Meru, Tanzania.World Animal Review,65, 24–30.
5. Kennedy, B. W., Schaeffer, L. R. & Sorenson, D. A. (1988). Genetic properties of animal models.Journal of Dairy Science,71, Suppl. 2.