Nicolson, Harold, 1886-1968. The Congress of Vienna : a study in allied unity: 1812-1822 / Harold Nicolson. - London : Constable & co. ltd., 1947. - xiii, 312 p. : ill., front., ports. ; 23 cm. Maps on lining-papers. "First published 1946." Includes index. Subjects--Geographic Terms: Europe--Politics and government--1789-1815. Dewey Class. No.: 940.27 / NIC 1947