Columbia subject headings:
Impeachments--United States.
Nixon, Richard M. (Richard Milhous), 1913-1994--Impeachment.
Harvard subject headings:
Impeachments--United States
Nixon, Richard M. (Richard Milhous), 1913-1994
Princeton subject headings:
Impeachments--United States.
Nixon, Richard M. (Richard Milhous), 1913-1994.