Apsler, Alfred. Iron chancellor: Otto von Bismarck. [electronic resource] . — New York, : J. Messner, [1968]. — 189 p. : maps. 22 cm. Bibliography: p. [183]-184. LCCN: 68025094 Subjects--Personal Names: Bismarck, Otto, Fürst von, 1815-1898. LC Class. No.: DD218.2 / .A7 Dewey Class. No.: 943.08/0924 B