Columbia subject headings:
Harvard subject headings:
Deaf--Employment--United States--Longitudinal studies.
Hearing impaired--Employment--United States--Longitudinal studies.
Professional employees--United States--Longitudinal studies.
Princeton subject headings:
Deaf--Employment--United States--Longitudinal studies.
Hearing impaired--Employment--United States--Longitudinal studies.
Professional employees--United States--Longitudinal studies.