Columbia subject headings:
Harvard subject headings:
Germany (East)--Politics and government.
Opposition (Political science)--Germany (East)
Political persecution--Germany (East)
Sozialistische Einheitspartei Deutschlands--History.
Princeton subject headings:
Germany (East)--Politics and government--20th century.
Opposition (Political science)--Germany (East)
Political persecution--Germany (East)
Sozialistische Einheitspartei Deutschlands--History.