Columbia subject headings:
Harvard subject headings:
Bismarck, Otto, Fürst von, 1815-1898.
Germany--History--1815-1866.
Germany--History--1866-1871.
Princeton subject headings:
Bismarck, Otto, Fürst von, 1815-1898.
Germany--History--1815-1866.
Germany--History--1866-1871.