Columbia subject headings:
Cold War.
Crozier, Brian.
Great Britain. MI6.
Intelligence service.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti.
United States. Central Intelligence Agency.
Harvard subject headings:
Cold War
Crozier, Brian, 1918-2012.
Crozier, Brian.
Great Britain. MI6.
Intelligence officers--Biography.
Intelligence service--History--20th century.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti.
United States. Central Intelligence Agency
Princeton subject headings:
Cold War.
Crozier, Brian, 1918-2012.
Great Britain. MI6
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti
United States. Central Intelligence Agency