Columbia subject headings:
Harvard subject headings:
Great Britain--Politics and government--18th century.
Great Britain--Politics and government--19th century.
Great Britain--Politics and government--20th century.
Prime ministers--Great Britain--Biography.
Princeton subject headings:
Great Britain--History--18th century.
Great Britain--History--19th century.
Great Britain--History--20th century.
Great Britain--Politics and government--18th century.
Great Britain--Politics and government--19th century.
Great Britain--Politics and government--20th century.
Prime ministers--Great Britain--Biography.