The Western Pennsylvania School for the Deaf
300 East Swissvale Avenue
Pittsburgh, PA 15218
(800) 624-3323 V/TTY
National Institute on Deafness and Other Communication Disorders (NIDCD): Hearing, Ear Infections, and Deafness
Laurent Clerc National Deaf Education Center - Gallaudet University
The Listen-Up Web! Hearing Aides & Earmolds
Marschark, Marc / Lang, Harry G / Albertini, John A.
Educating Deaf Students: From Research to Practice, New York
Oxford University Press, 2002.
Download Chapter 3: "Definitions & Demographics"