Title: Taĭny spet͡s︡svi͡a︡zi Stalina
Subjects: History, Politics and government, Secret service, Soviet Union, Soviet Union. Narodnyĭ komissariat vnutrennikh del, Soviet Union. Obʺedinennoe gosudarstvennoe politicheskoe upravlenie, Intelligence service, World War, 1939-1945, Communications
Places: Soviet Union
Time periods: 1917-1936, 1936-1953