1. D. J.Davis: “A Newer Knowledge of Bacteriology and Immunology” edited byE.JordonandI. S.Falk 1928 Chapter XLVII page650.
2. W. L.BrownandR.Hilton: “Physiological Principles in Treatment” Eighth Edition 1943 page94.
3. Remarks on THE GALL-BLADDER IN RELATION TO FOCAL INFECTION
4. J. L.Appleton: “Bacterial Infection” Third Edition 1944 page400.
5. The Distribution of Oral Streptococci in the Tissues;Fish E. W.;British Dental Journal,1936