1. The stability of proofs for Holstein bulls sampled under limited and multi-herd conditions;Cassell;J. Dairy Sci.,1976
2. Dickinson, F. N., H. D. Norman, G. J. King, J. F. Keown, and R. L. Powell. 1974 (October)–1976 (May). USDA-DHIA sire summary list. U.S. Dep. Agr. ARS-NE-24-2.
3. An introduction to the USDA-DHIA Modified Contemporary Comparison;Dickinson;U. S. Dep. Agr. Prod. Res. Rpt.,1976
4. Relation between initial and later United States Department of Agriculture–Dairy Herd Improvement Association sire summaries;McDaniel;J. Dairy Sci.,1969
5. Modified Contemporary and herdmate comparison in sire summary;Norman;J. Dairy Sci.,1976