1. Oral Roentgenographic Diagnosis;Stafne,1963
2. Stafne, E. C. (Mayo Clinic, Rochester, Minn): Personal communication, 1965.
3. Congenital Malformations of Palate, Face and Neck;Kieth;Brit. M. J,1909
4. A Textbook of Oral Pathology;Shafer,1963
5. Median Cleft Lip: Report of a Case;Schneider;J. Oral Surg,1951