Columbia subject headings:
Blunt, Anthony, 1907-1983.
Burgess, Guy, 1911-1963.
Cairncross, John.
Espionage, Soviet--Great Britain.
Maclean, Donald, 1913-1983.
Philby, Kim, 1912-1988.
Spies--Great Britain--Biography.
University of Cambridge--Biography.
Harvard subject headings:
Blunt, Anthony, 1907-1983.
Burgess, Guy, 1911-1963.
Cairncross, John.
Espionage, Soviet--Great Britain.
Maclean, Donald, 1913-1983.
Philby, Kim, 1912-1988.
Spies--Great Britain--Biography.
University of Cambridge--Biography.
Princeton subject headings:
Blunt, Anthony, 1907-1983.
Burgess, Guy, 1911-1963.
Cairncross, John.
Espionage, Soviet--Great Britain.
Maclean, Donald, 1913-1983.
Philby, Kim, 1912-1988.
Spies--Great Britain--Biography.
University of Cambridge--Biography.