Columbia subject headings:
Germany--History--1918-1933--Sources.
Mass media--Political aspects--Germany--History--20th century--Sources.
Socialism--Germany--History--20th century--Sources.
Harvard subject headings:
Germany--History--1918-1933--Sources.
Mass media--Political aspects--Germany--History--20th century--Sources.
Socialism--Germany--20th century--Sources.
Socialism--Germany--History--20th century--Sources.
Princeton subject headings:
Socialism and culture--Germany--History--20th century.
Sozialdemokratische Partei Deutschlands.