Columbia subject headings:
Prime ministers--Great Britain--History--20th century.
Harvard subject headings:
Great Britain--Politics and government--1945-
Leadership--Great Britain--History--20th century.
Prime ministers--Great Britain--History--20th century.
Princeton subject headings:
Great Britain--Politics and government--1945-
Leadership--Great Britain--History--20th century.
Prime ministers--Great Britain--History--20th century.