Columbia subject headings:
Communism--Germany (East)--History--Congresses.
Kommunistische Partei Deutschlands--History--Congresses.
Socialism--Germany (East)--History--Congresses.
Thälmann, Ernst, 1886-1944--Congresses.
Harvard subject headings:
Germany (East)--History.
Thälmann, Ernst, 1886-1944
Princeton subject headings:
Communism--Germany (East)--History--Congresses.
Kommunistische Partei Deutschlands--History--Congresses.
Socialism--Germany (East)--History--Congresses.
Thälmann, Ernst, 1886-1944--Congresses.