Columbia subject headings:
Germany--History--1866-1871.
Germany--History--1871-1918.
Germany--History--1918-1933.
Germany--History--1933-1945.
Harvard subject headings:
Germany--History--1866-1871.
Germany--History--1871-1918.
Germany--History--1918-1933.
Germany--History--1933-1945.
Princeton subject headings:
Germany--History--1866-1871.
Germany--History--1871-1918.
Germany--History--1918-1933.
Germany--History--1933-1945.