Columbia subject headings:
Azerbaijan--History--1917-1991.
Azerbaijan--History--Autonomy and independence movements.
Intelligence service--Soviet Union--History.
Political persecution--Azerbaijan--History.
Secret service--Soviet Union--History.
Soviet Union--History.
Harvard subject headings:
Azerbaijan--History--1917-1991.
Azerbaijan--History--Autonomy and independence movements.
Intelligence service--Soviet Union--History.
Political persecution--Azerbaijan--History.
Secret service--Soviet Union--History
Soviet Union--History.
Princeton subject headings: