References
- Coventry K. R., Clibbens J., Cooper M., Rood B. Visual speech aids: a British survey of use and evaluation by speech and language therapists. European Journal of Disorders of Communication 1997; 32: 203–216
- Enderby P., Davies P. Communication disorders: planning a service to meet the needs. British Journal of Disorders of Communication 1989; 18: 13–21
- Enderby P., Philipp R. Speech and language handicap: towards knowing the size of the problem. British Journal of Disorders of Communication 1986; 21: 151–165
- The Association of Speech and Language Therapy Managers. Managers' Directory. The Association of Speech and Language Therapy Managers, Cirencester 1995
- World Health Organization. International Classification of Impairments, Disabilities, and Handicaps. WHO, Geneva 1980