Columbia subject headings:
Bismarck, Otto, Fürst von, 1815-1898.
Bismarck-Schönhausen, Otto Eduard Leopold, fürst von, 1815-1898.
Germany--Foreign relations.
World War, 1914-1918--Causes.
Harvard subject headings:
Bismarck, Otto, Fürst von, 1815-1898.
Germany--Foreign relations--1871-1918.
World War, 1914-1918--Causes
World War, 1914-1918--Diplomatic history
Princeton subject headings:
Bismarck, Otto, Fürst von, 1815-1898.
Germany--Foreign relations.
World War, 1914-1918--Causes.