1. Agriculture Canada. 1976. Dairy sire appraisal direct comparison. Report 34, June 1976. Production and Marketing Branch, Livestock Division.
2. Agricultural Research Service. 1976. Editing of lactation records used in USDA-DHIA genetic evaluations of sires and cows. Dairy Herd Improvement Letter, USDA ARS-44-222.
3. Genotype-climatic and other interaction effects for productive responses in Holsteins;Branton;J. Dairy Sci.,1974
4. Genetic aspects of beef production among Holstein-Friesians pedigree selected for milk production;Calo;J. Anim. Sci.,1973
5. USDA-DHIA sire summaries calculated on a regional basis;Dickinson,1976