Columbia subject headings:
Harvard subject headings:
Germany--History--1871-1918.
Germany--History--1918-1933.
Germany--History--1933-1945.
Princeton subject headings:
Germany--History--1871-1918.
Germany--History--1918-1933.
Germany--History--1933-1945.
Germany--Social life and customs--20th century.
Mass media--Germany--History--20th century.
Noise--Germany--History--20th century.
Sounds--Germany--History--20th century.