Columbia subject headings:
Secret service--Soviet Union--History.
Soviet Union. Narodnyĭ komissariat vnutrennikh del.
World War, 1939-1945--Secret service--Soviet Union.
World War, 1939-1945--Underground movements--Soviet Union.
Harvard subject headings:
Lubi︠a︡nka (Prison : Moscow, Russia)
Secret service--Soviet Union--History
Soviet Union. Narodnyĭ komissariat vnutrennikh del
World War, 1939-1945--Secret service--Soviet Union.
World War, 1939-1945--Underground movements--Soviet Union.
Princeton subject headings:
Secret service--Soviet Union--History.
Soviet Union. Narodnyĭ komissariat vnutrennikh del
World War, 1939-1945--Secret service--Soviet Union.
World War, 1939-1945--Underground movements--Soviet Union.