Sino-Soviet Dialogue on the Problem of War. By John Yin. [The Hague: Martinus Nijhoff, 1971. 247 pp. No price available.]L'U.R.S.S. et la Chine devant les révolutions dans les sociétés pré-industrielles. By Hélène Carrère d'Encausse and Stuart R Schram. [Paris: Armand Colin, 1970. 108 pp. F.18.00.]The Bear at the Gate: Chinese Policymaking Under Soviet Pressure. By Harold C. Hinton. [Washington: American Enterprise Institute for Public Policy Research, 1971. 112 pp. $3.00.]