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