Columbia subject headings:
Harvard subject headings:
Great Britain--Politics and government--1830-1837.
Great Britain--Politics and government--1837-1901
Great Britain--Politics and government--1901-1936.
Great Britain--Politics and government--1936-1945.
Princeton subject headings:
Democracy--Great Britain--History.
Great Britain--Politics and government--19th century.
Great Britain--Politics and government--20th century.