Columbia subject headings:
Germany (East)--Politics and government.
Germany (East)--Social conditions.
Opposition (Political science)--Germany (East)
Socialism--Germany (East)--History.
Harvard subject headings:
Germany (East)--Politics and government.
Germany (East)--Social conditions.
Opposition (Political science)--Germany (East)
Political persecution--Germany (East)
Socialism--Germany (East)
Socialism--Germany (East)--History
Princeton subject headings:
Germany (East)--Politics and government.
Germany (East)--Social conditions.
Opposition (Political science)--Germany (East)
Socialism--Germany (East)--History.