Columbia subject headings:
Germany (East)--Foreign relations--Germany (West)
Germany (West)--Foreign relations--Germany (East)
Harvard subject headings:
Germany (East)--Foreign relations--Germany (West)
Germany (West)--Foreign relations--Germany (East)
Princeton subject headings:
Germany (East)--Foreign relations--Germany (West)
Germany (West)--Foreign relations--Germany (East)
Germany--Politics and government--1945-1990.