Columbia subject headings:
Europe, Eastern--Foreign relations--Soviet Union.
Europe, Eastern--Military relations--Soviet Union.
Soviet Union--Foreign relations--Europe, Eastern.
Soviet Union--Military relations--Europe, Eastern.
Warsaw Treaty Organization.
Harvard subject headings:
Europe, Eastern--Foreign relations--Soviet Union.
Europe, Eastern--Military relations--Soviet Union.
Soviet Union--Foreign relations--Europe, Eastern.
Soviet Union--Military relations--Europe, Eastern.
Warsaw Treaty Organization.
Princeton subject headings:
Europe, Eastern--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Europe, Eastern.