Columbia subject headings:
Political atrocities--Soviet Union--History.
Political persecution--Soviet Union--History.
Political purges--Soviet Union--History.
Soviet Union--Politics and government--1917-1936.
Soviet Union--Politics and government--1936-1953.
Stalin, Joseph, 1878-1953.
Harvard subject headings:
Princeton subject headings:
Communists--Soviet Union--Death.
Official secrets--Soviet Union.
Soviet Union--Biography.
Statesmen--Soviet Union--Death.