Columbia subject headings:
Harvard subject headings:
Bismarck, Otto, Furst von, 1815-2015.
Bismarck, Otto, Fürst von, 1815-1898.
Germany--History--1871-1918.
Germany--Politics and government--1871-
Germany--Politics and government--1871-1918.
Germany--Politics and government--21st century.
Prussia (Germany)--Politics and government--1815-1870.
Princeton subject headings:
Bismarck, Otto, Fürst von, 1815-1898.
Germany--Politics and government--21st century.