Columbia subject headings:
Harvard subject headings:
Political persecution--Soviet Union.
Prisons--Soviet Union
Soviet Union--Biography.
Soviet Union--History--1925-1953.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti.
Soviet Union. Narodnyĭ komissariat vnutrennikh del
Princeton subject headings:
Political persecution--Soviet Union.
Prisons--Soviet Union.
Soviet Union--Biography.
Soviet Union--History--1925-1953.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti
Soviet Union. Narodnyĭ komissariat vnutrennikh del