Columbia subject headings:
Great Britain. Joint Intelligence Committee--History--20th century--Case studies.
Great Britain. Joint Intelligence Committee--History--21st century--Case studies.
Intelligence service--Great Britain--History--20th century--Case studies.
Intelligence service--Great Britain--History--21st century--Case studies.
Harvard subject headings:
Great Britain--Foreign relations--20th century.
Great Britain--Foreign relations--21st century.
Great Britain. Joint Intelligence Committee--History--20th century--Case studies.
Great Britain. Joint Intelligence Committee--History--21st century--Case studies.
Intelligence service--Great Britain--History--20th century--Case studies.
Intelligence service--Great Britain--History--21st century--Case studies.
Princeton subject headings:
Case studies.
Great Britain--Foreign relations--20th century.
Great Britain--Foreign relations--21st century.
Great Britain. Joint Intelligence Committee--History--20th century--Case studies.
Great Britain. Joint Intelligence Committee--History--21st century--Case studies.
Intelligence service--Great Britain--History--20th century--Case studies.
Intelligence service--Great Britain--History--21st century--Case studies.