Columbia subject headings:
Press, Communist--Germany--History--20th century--Sources.
Press, Political party--Germany--History--Sources.
Rote Kämpfer.
Harvard subject headings:
Press, Communist--Germany--History--20th century--Sources.
Press, Political party--Germany--History--Sources.
Rote Kämpfer.
Princeton subject headings:
Journalism, Socialist--Germany--History.
Press, Labor--Germany--History.
Rote Kämpfer.