1. Amble, V. N., Krishnan, K. S. and Soni, P. N. (1961). A review of the breeding results obtained in some Indian herds of dairy cattle. 14thmeeting of the Animal Husbandry Wing of the Board of Agriculture in India.
2. Cochran, W. G. (1951). Improvement by means of selection.Proceedings of the Second Berkeley Symposium on Mathematical Statistics and Probability, 449–470.
3. Dickerson, G. E. And Hazel, L. N. (1944). Effectiveness of selection on progeny performance as a supplement to earlier culling in livestock.Jour. Agri. Res.,69, 459–476.
4. Edwards, J. (1932). Breeding for milk production in the tropics.Jour. Dairy Res.,3, 281–293.
5. Forman, K. W. (1927). Cross-breeding and grading of cattle in India.Jour. Central Bur. of A. H. and Dairying in India,1, 108–111.