1. Bacteriological Tests for Root Canal Sterility;Yates;J.A.D.A.,1938
2. Bacterial Infection;Appleton,1933
3. Bacteriologie Verification of Roentgenographic Findings in Pulp-Involved Teeth;Sommer;J.A.D.A.,1940
4. Focal Infection and Systemic Disease, Critical Appraisal;Reimann;J.A.M.A.,1940
5. Results of Culturing Root Canals by Simple Anaerobic Method;Buchbinder;J. D. Res.,1940