Columbia subject headings:
Communist countries--Politics and government.
Disarmament.
Europe--Politics and government--1945-
Harvard subject headings:
Conference on Security and Cooperation in Europe (1972-1975 : Helsinki, Finland)
Conference on Security and Cooperation in Europe.
Detente.
Europe, Eastern--Foreign relations--1945-
Europe, Eastern--Foreign relations--1945-1989.
Princeton subject headings:
Communist countries--Politics and government.
Detente.
Europe--Politics and government--1945-