1. Dental asepsis;Whitacre,1979
2. Infectious hepatitis;Krugman;JAMA,1967
3. Hepatitis B antigen: saliva, urine, and stool;Irwin;Infect Immun,1975
4. Viral hepatitis—an occupational risk of dentists;Smith;NW Dent,1976
5. New light on the transmissibility of viral hepatitis in dental practice and its control;Crawford;JADA,1975