Columbia subject headings:
Europe, Eastern--Politics and government--1945-1989.
Germany (East)--Politics and government--1989-1990.
Political violence--Europe, Eastern--History--20th century.
Political violence--Germany (East)
Protest movements--Europe, Eastern--History--20th century.
Protest movements--Germany (East)
Revolutions--Europe, Eastern--History--20th century.
Revolutions--Germany (East)
Harvard subject headings:
Europe, Eastern--Politics and government--1945-1989.
Germany (East)--Politics and government--1989-1990.
Political violence--Europe, Eastern--History--20th century.
Political violence--Germany (East)
Protest movements--Europe, Eastern--History--20th century.
Protest movements--Germany (East)
Revolutions--Europe, Eastern--History--20th century.
Revolutions--Germany (East)
Princeton subject headings:
Europe, Eastern--Politics and government--1945-1989.
Germany (East)--Politics and government--1989-1990.
Political violence--Europe, Eastern--History--20th century.
Political violence--Germany (East).
Protest movements--Europe, Eastern--History--20th century.
Protest movements--Germany (East)
Revolutions--Europe, Eastern--History--20th century.
Revolutions--Germany (East).