1. The Nature of Stuttering;Van Riper,1971
2. Alterations in self concept: A barometer of progress in individuals undergoing therapy for stuttering;Clark,1965
3. Speech Correction: Principles and Methods;Van Riper,1963
4. Memoir on the Radical Cure of Stuttering by a Surgical Operation;Dieffenbach,1841
5. Stuttering: Research and Therapy;Sheehan,1970