Columbia subject headings:
Germany (East)--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--1945-1991.
Soviet Union--Foreign relations--Germany (East)
Harvard subject headings:
Germany (East)--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--1945-1991.
Soviet Union--Foreign relations--Germany (East)
Princeton subject headings:
Germany (East)--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--1945-1991.
Soviet Union--Foreign relations--Germany (East).