Columbia subject headings:
Harvard subject headings:
Communism--Germany--History
Germany--Politics and government.
Linkspartei (Germany)--History.
Radicalism--Germany--History.
Socialism--Germany
Socialism--Germany--History
Sozialistische Einheitspartei Deutschlands--History.
Princeton subject headings:
Communism--Germany--History.
Germany--Politics and government--History.
Linkspartei (Germany)
Socialism--Germany--History.