References
- Best N. Deafness and the Deaf in the United States. The MacMillan Company, New York 1943; 34–72, Pp. xix + 675. Chapter Two, pp.
- Stevenson E. A. Are our deaf all deaf?. American Annals of the Deaf November, 1919; 64(5)351–359
- Myklebust H. R. Auditory Disorders in Children. Grune and Stratton, New York 1954; 275, Pp. xii + 367
- Reichling A. A new method of speech training in deaf mutism. Proceedings of the Second International Congress in Orthopedics. Systemen Keesing, Publishers, Amsterdam 1950; 126–133, Pp. xii + 534, pp.