Columbia subject headings:
Harvard subject headings:
Berlin Wall, Berlin, Germany, 1961-1989
Germany (East)--Politics and government--1989-1990
Germany--Politics and government--1945-1990
Protest movements--Germany--History--20th century.
Princeton subject headings:
Berlin Wall, Berlin, Germany, 1961-1989.
Germany (East)--Politics and government--1989-1990.
Germany--Politics and government--1945-1990.
Protest movements--Germany--History--20th century.