1. Pathways of the pulp;Cohen,1976
2. Endodontics;Ingle,1976
3. Direct approach to pulp chambers and canal orifices;Lieban;NY J Dent,1958
4. The angle of entry, its importance in molar endodontics;Ettinger;NY State Dent J,1968
5. Diagnostic value of supplemental bitewing radiographs;Degering;Dent Radiogr Photogr,1968