1. Cattle Fertility and Sterility;Asdell,1955
2. The Time of Ovulation in Cattle;Brewster;J. Dairy Sci.,1941
3. Prenatal Death as a Factor in the Fertility of Farm Animals;Casida;Iowa State College J. Sci.,1953
4. Fertilization Failure and Embryonic Death in Domestic Animals;Casida,1953
5. Development of Bovine Blastocyst with a Note on Implantation;Chang;Anat. Record,1952