1. National Formulary,1965
2. A Survey of Endodontics as Taught in the Dental Schools in the United States and Canada;Uchin;Oral Surg,1963
3. Clinical Endodontics;Sommer,1956
4. What Constitutes Reinfection of Root Canals and How Can It Be Prevented?;Prinz;Dent. Cosmos,1919
5. Clinical Endodontics;Sommer,1966