1. The effect of season of the year and advancing lactation upon milk yield of Jersey cows;Arnold;J. Dairy Sci.,1935
2. Some hereditary and environmental aspects of persistency of milk yield of Holstein-Friesians in Louisiana;Branton;J. Dairy Sci.,1959
3. Personal communication;Butcher,1970
4. Evans, D. L. 1972. Genetic and economic considerations of productive traits in a Louisiana dairy herd under three systems of feeding. Ph.D. dissertation, Louisiana State University, Baton Rouge.
5. Dairy cattle: Principles, practices, problems, profits;Foley,1972