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