Columbia subject headings:
College teachers--United States--Economic conditions.
College teachers--United States--Social conditions.
College teachers.
Teachers--United States--Economic conditions.
Teachers--United States--Social conditions.
Harvard subject headings:
College teachers--United States--Economic conditions.
College teachers--United States--Social conditions.
College teachers.
Teachers--United States--Economic conditions.
Teachers--United States--Social conditions.
Princeton subject headings: