Columbia subject headings:
Harvard subject headings:
Bismarck, Otto, Fürst von, 1815-1898.
Europe--History--1848-1871.
Europe--History--1871-
Germany--History--1848-1870.
Germany--History--1871-
Princeton subject headings:
Bismarck, Otto, Fürst von, 1815-1898.
Europe--History--1848-1871.
Europe--History--1871-.
Germany--History--1848-1870.
Germany--History--1871-