Columbia subject headings:
Harvard subject headings:
Advertising--Postal service--Germany--History--Catalogs.
Advertising--Telecommunication--Germany--History--20th century.
Industrial films--Germany--History--Catalogs.
Motion pictures in advertising--Germany--History--Catalogs.
Motion pictures--Germany--Plots, themes, etc.--History--20th century--Catalogs.
Postal service--Germany--History--20th century--Catalogs.
Telecommunication--Germany--History--20th century.
Princeton subject headings:
Advertising--Postal service--Germany--History--Catalogs.
Advertising--Telecommunication--Germany--History--20th century.
Catalogs.
Industrial films--Germany--History--Catalogs.
Motion pictures in advertising--Germany--History--Catalogs.
Motion pictures--Germany--Plots, themes, etc.--History--20th century--Catalogs.
Postal service--Germany--History--20th century--Catalogs.
Telecommunication--Germany--History--20th century.