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