Columbia subject headings:
Policy sciences--Research--United States.
Social sciences--Research--United States.
United States--Politics and government--1945-1989.
Harvard subject headings:
Policy sciences--Research--United States.
Social sciences--Research--United States
United States--Politics and government--1945-1989.
Princeton subject headings:
Policy sciences--Research--United States.
Social sciences--Research--United States.
United States--Politics and government--1945-1989.