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