Columbia subject headings:
Great Britain--Colonies--History--20th century.
Great Britain--History--20th century.
Intelligence service--Great Britain--History--20th century.
International relations--History--20th century.
Harvard subject headings:
Cold War
Great Britain--Colonies--History--20th century.
Great Britain--History--20th century.
Intelligence service--Great Britain--History--20th century.
Intelligence service--Great Britain--History.
Intelligence service--History--20th century.
International relations--History--20th century
Princeton subject headings:
Great Britain--Colonies--History--20th century.
Great Britain--History--20th century.
Intelligence service--Great Britain--History.
Intelligence service--History--20th century.
International relations--History--20th century.