Columbia subject headings:
Nixon, Richard M. (Richard Milhous), 1913-1994--Impeachment.
Watergate Affair, 1972-1974.
Harvard subject headings:
Nixon, Richard M. (Richard Milhous), 1913-1994--Impeachment.
Watergate Affair, 1972-1974.
Princeton subject headings:
Nixon, Richard M. (Richard Milhous), 1913-1994--Impeachment.
Watergate Affair, 1972-1974.