References
- Miller, P. D., 1973. A recent study of age adjustment. J. Dairy Sci., 56: 952–959.
- Searle, S. R., Henderson, C. R., 1959. Establishing age-correction factors related to the level of herd production. J. Dairy Sci., 42: 824–1043.
- Searle, S. R., Henderson, C. R., 1960. Judging the effectiveness of age-correction factors. J. Dairy Sci. 43: 966–974.