1. Bacterial Infection;Appleton,1933
2. Burchard, H. H., and Englis, O. E.: Dental Pathology and Therapeutics, Philadelphia, Lea & Febiger.
3. Root Canal Therapy;Grossman,1940
4. Basic Principles of General and Oral Pathology;Cahn,1929
5. Dental Caries;Gottlieb,1947