Columbia subject headings:
Nixon, Richard M. (Richard Milhous), 1913-1994.
Presidents--United States--Biography.
United States--Politics and government--1945-1989.
Harvard subject headings:
Nixon, Richard M. (Richard Milhous), 1913-1994
Presidents--United States--Biography
United States--Politics and government--1945-1989.
Princeton subject headings:
Nixon, Richard M. (Richard Milhous), 1913-1994.
Presidents--United States--Biography.