1. American National Standards Institute. (1989). American National Standard specification for audiometers (ANSI S3.6-1989). Washington DC: Author.
2. Guidelines for determining the threshold level for speech;ASHA;Asha,1988
3. Black Deaf adolescents: A diverse and underserved population;Anderson G. B.;Volta Review,1991
4. Deaf children from ethnic, linguistic and racial minority backgrounds;Cohen O. P.;American Annals of the Deaf,1990