1. Modern Practice in Crown and Bridge Prosthodontics;Johnston,1965
2. Practical Crown and Bridge Prosthodontics;Wilson,1962
3. Fixed Partial Prosthodontics;Dykema;J. Tennessee D. A.,1962
4. Abutments;Ante;J. Canadian D. A.,1936
5. Root Surface Measurement and a Method for X-ray Determination of Root Surface Area;Jepsen;Acta odont. scandinav.,1963