Book Reviews : The Kremlin Since Stalin. Wolfgang Leonhard. Trans: by E. Wiskermann and M. Jackson. Oxford University Press. 42/Russian Foreign Policy. Essays in Historical Perspective. Edited by Ivo J. Lederer. Yale University Press. 80/The Sino-Soviet Conflict 1956-1961. Donald S. Zagora. Princeton. London: Oxford University Press. 50/A Key to Soviet Politics; The Crisis of the Anti-Party Group. Roger Pethybridge. Allen and Unwin. 21/Strategy and Tactics of Soviet Foreign Policy. J. M. Mackintosh. Oxford University Press. 38/