Grey, Ian, 1918- The first fifty years: Soviet Russia, 1917-67. [electronic resource] . — [1st American ed.]. — New York, : Coward-McCann, [1967]. — 558 p. : maps, ports. 23 cm. Bibliography: p. 536-539. LCCN: 67027528 Subjects--Geographic Terms: Soviet Union--History. LC Class. No.: DK266 / .G717 1967b Dewey Class. No.: 947.08