Columbia subject headings:
Great Britain--Politics and government--1964-1979.
Great Britain. Parliament--Elections.
Great Britain. Parliament--Rules and practice.
Harvard subject headings:
Coalition governments--Great Britain.
Great Britain--Politics and government--20th century.
Great Britain. Parliament
Representative government and representation--Great Britain
Princeton subject headings:
Great Britain--Politics and government--1964-.
Great Britain. Parliament--Elections.
Great Britain. Parliament--Rules and practice.