Columbia subject headings:
Europe, Eastern--Politics and government.
People's democracies.
Soviet Union--Foreign relations--1945-1991.
Harvard subject headings:
Europe, Eastern--Politics and government.
People's democracies.
Soviet Union--Foreign relations--1945-1991.
Princeton subject headings:
Europe, Eastern--Politics and government--1945-1989.
People's democracies.
Soviet Union--Foreign relations--1945-1991.