Wren, Melvin C. The course of Russian history / Melvin C. Wren. - New York : Macmillan, 1958. - xiii, 725 p. : illus., maps, ports. ; 24 cm. Col. map on lining papers. Includes bibliographies. LCCN: 58005213 Subjects--Geographic Terms: Soviet Union--History. LC Class. No.: DK41 / .W7