References
- Boies L. R., Hilger J. A., Robert Priest. Fundamentals of Otolaryngology. W. B. Saunders, Phila. 1964; 157–160
- Breakey Margaret. Personal Communications to the author. 1965
- Carson E. T. Rehabilitation of the Deafened. Otolaryngology, Chapter Vii 1963; II, Vol., W. F. Prior Co., Hagerstown, Md.
- Mykelbust H. R. Auditory disorders in children. Grune & Stratton, New York 1954