1. Modern Practice in Crown and Bridge Prosthodontics;Johnston,1971
2. Theory and Practice of Crown and Bridge Prosthodontics;Tylman,1965
3. Theory and Practice of Crown and Bridge Prosthodontics;Tylman,1965
4. Prosthetic considerations essential for gingival health;Stein;Dent Clin North Am,1960
5. Reactions of marginal periodontal tissues to restorative procedures;Loe;Int Dent J,1968