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