Columbia subject headings:
Government and the press--Germany--Cologne--History--20th century.
M. DuMont Schauberg (Firm)--History.
National socialism and publishing--Germany--Cologne.
Harvard subject headings:
Kölnische Zeitung.
M. DuMont Schauberg (Firm)--History.
Newspaper publishing--Germany--History--20th century.
Princeton subject headings: