1. The anatomy of the root canals of the teeth of the permanent and deciduous dentitions;Hess,1925
2. Clinical endodontics; a manual of scientific endodontics;Sommer,1956
3. Transparent model teeth with pulps;Rosensteil;Dent Digest,1957
4. The demonstration of root canal anatomy;Barker;Aust Dent J,1969