Columbia subject headings:
United States--Politics and government--1963-1969.
United States--Politics and government--1969-1974.
Vietnam War, 1961-1975--United States.
Watergate Affair, 1972-1974.
Harvard subject headings:
United States--Politics and government--1963-1969
United States--Politics and government--1969-1974
Vietnam War, 1961-1975--United States
Watergate Affair, 1972-1974
Princeton subject headings:
United States--Politics and government--1963-1969.
United States--Politics and government--1969-1974.
Vietnam War, 1961-1975--United States.
Watergate Affair, 1972-1974.