1. Relationships or reproduction traits, body weight and milk yield in dairy cattle;Batra;Can. J. Anim. Sci.,1987
2. Beltramino, F. E. 1984. Genetic analysis of reproductive measures in dairy cows and their relationship with milk production. Ph.D. Thesis, Cornell Univ., Ithaca, NY.
3. An analysis of transformation;Box;J. Roy. Stat. Soc.,1964
4. Selection for fertility traits;Distl,1982
5. A. I. bull evaluation standards for dairy and dual purpose bleeds;Gaillard;Livest. Prod. Sci.,1977