Columbia subject headings:
Harvard subject headings:
Germany (East)--Politics and government--1989-1990.
Opposition (Political science)--Germany (East)--History--20th century.
Protest movements--Germany (East)--History--20th century.
Princeton subject headings:
Germany (East)--Politics and government--1989-1990.
Opposition (Political science)--Germany (East)--History--20th century.
Protest movements--Germany (East)--History--20th century.