Columbia subject headings:
Deaf--Education--United States.
Deaf--Means of communication.
Deaf--United States.
Deafness--Psychological aspects.
Hearing impaired--United States.
Harvard subject headings:
Deaf--Education--United States
Deaf--Means of communication
Deaf--United States.
Deafness--Psychological aspects.
Hearing impaired--United States.
Princeton subject headings: