Columbia subject headings:
Conference on Security and Cooperation in Europe (Organization)--History--20th century.
Perestroĭka.
Soviet Union--Foreign relations--1985-1991.
Soviet Union--Politics and government--1985-1991.
Harvard subject headings:
Conference on Security and Cooperation in Europe (Organization)--History--20th century.
Perestroĭka
Soviet Union--Foreign relations--1985-1991.
Soviet Union--Politics and government--1985-1991.
Princeton subject headings:
Conference on Security and Cooperation in Europe (Organization)--History--20th century.
Perestroĭka.
Soviet Union--Foreign relations--1985-1991.
Soviet Union--Politics and government--1985-1991.