Columbia subject headings:
Communism--Germany (East)--History--20th century--Sources.
Germany--Politics and government--20th century.
Kommunistische Partei Deutschlands--History--Sources.
Socialism--Germany (East)--History--20th century--Sources.
Harvard subject headings:
Kommunistische Partei Deutschlands--History--Sources.
Princeton subject headings:
Communism--Germany (East)--History--20th century--Sources.
Germany (East)--Politics and government--Sources.
Kommunistische Partei Deutschlands--History--Sources.
Socialism--Germany (East)--History--20th century--Sources.