Columbia subject headings:
Harvard subject headings:
Democratization--Germany (East)--History.
Environmentalism--Germany (East)--History.
Germany (East)--Politics and government--1989-1990.
Social movements--Germany (East)--History.
Princeton subject headings:
Environmental policy--Germany (East)
Germany (East)--Politics and government.
Green movement--Germany (East)--History.
Protest movements--Germany (East)