1. Alexander, J. L. 1978. The cost of brucellosis to two California dairies. Preliminary analysis. Unpub. Masters thesis, School Vet. Med., Dep. Epidemiol. Preventive Med., Univ. California, Davis.
2. Etude de cinq facteurs pouvant influencer la moyenne d’inseminations par vache laitier;Arbour;MV Quebec,1974
3. An economic appraisal of a preventative medicine program for dairy herd health management;Barfoot;Can. Vet. J.,1971
4. The influence of socio-psychological aspects of managers on disease occurrence and productivity of dairy herds;Bigras-Poulin,1982
5. Bokma, R. 1977. Calf mortality studies on randomly selected dairies in southern Sacramento County, California: Preliminary analysis. School Vet. Med., Dep. Epidemiol. Preventive Med., Univ. California, Davis.