Columbia subject headings:
Legislation--United States.
United States--Politics and government--1945-1989.
United States--Politics and government--1989-
United States. Congress--Decision making.
Harvard subject headings:
Legislation--United States.
United States--Politics and government--1945-1989.
United States. Congress.
Princeton subject headings:
Legislation--United States.
United States--Politics and government--1945-1989.
United States--Politics and government--1989-1993.
United States. Congress