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