Columbia subject headings:
Berlin (Germany)--History--1945-1990.
Berlin (Germany)--Politics and government--1945-1990.
Harvard subject headings:
Berlin (Germany)--History--1945-1990
Berlin (Germany)--Politics and government--1945-
Berlin (Germany)--Politics and government--1945-1990
Princeton subject headings:
Berlin (Germany)--Politics and government--1945-1990.