Columbia subject headings:
Espionage, Russian--History.
Espionage, Soviet--History.
Intelligence service--Russia (Federation)--History.
Intelligence service--Soviet Union--History.
Military intelligence--Russia (Federation)--History.
Military intelligence--Soviet Union--History.
World War, 1939-1945--Military intelligence--Soviet Union.
Harvard subject headings:
Espionage, Russian--History.
Espionage, Soviet--History.
Intelligence service--Russia (Federation)--History.
Intelligence service--Soviet Union--History.
Military intelligence--Russia (Federation)--History.
Military intelligence--Soviet Union--History.
World War, 1939-1945--Military intelligence--Soviet Union.
Princeton subject headings:
Espionage, Russian--History.
Espionage, Soviet--History.
Intelligence service--Russia (Federation)--History.
Intelligence service--Soviet Union--History.
Military intelligence--Russia (Federation)--History.
Military intelligence--Soviet Union--History.
World War, 1939-1945--Military intelligence--Soviet Union.