Columbia subject headings:
Christlich-Demokratische Union Deutschlands. Ostbüro--History.
Cold War.
Freie Demokratische Partei Deutschlands. Ostbüro--History.
Sozialdemokratische Partei Deutschlands. Ostbüro--History.
Harvard subject headings:
Germany (East)--Politics and government.
Opposition (Political science)--Germany (East)--History.
Political parties--Germany (East)--History.
Princeton subject headings:
Christlich-Demokratische Union Deutschlands. Ostbüro--History.
Cold War.
Freie Demokratische Partei. Ostbüro--History.
Sozialdemokratische Partei Deutschlands. Ostbüro--History.