References
- McCall, J. O. and Wald, S. S. (1952) Clinical Dental Roentgenology, W. B. Saunders Company, Philadelphia & London
- Sicher, H. (1949) Oral Anatomy, The C. V. Mosby Company, St Louis
- Worth, H. M. (1951) The normal Teeth and Jaws. S. Cochrone Shanks and Peter Kerley: A Text-Book of X-Ray Diagnosis., H. K. Lewis & Co., London