Columbia subject headings:
Germany (East)--Foreign relations--Germany (West)
Germany (East)--Foreign relations.
Germany (West)--Foreign relations--Germany (East)
World politics--1945-1989.
Harvard subject headings:
Princeton subject headings:
Germany (East)--Foreign relations--Germany (West)
Germany (East)--Foreign relations.
Germany (West)--Foreign relations--Germany (East)
World politics--1945-1989.