Book Reviews : SIPRI Yearbook of World Armaments and Disarmament, 1969/70. By STOCK HOLM INTERNATIONAL PEACE RESEARCH INSTITUTE. (Stockholm: Almqvist & Wiksell; New York: Humanities Press; London: Gerald Duckworth & Co. Ltd.; New Delhi: Oxford & IBH Publ. Co., 1970. Pp. 540, including Tables, Charts. $16.50 cloth, $8.75 paper.) To End War. An Introduction to the Ideas, Organizations and Current Books. By ROBERT PICKUS and ROBERT WOITO. (3rd. ed.; Berkeley, California: World Without War Council, 1970. Pp. 261. $1.95.) Impact of New Technologies on the Arms Race. Edited by B. T. FELD, T. GREEN- WOOD, G. W. RATHJENS, and S. WEINBERG. (Cambridge, Mass., and London, England: The M.I.T. Press, 1971. Pp. 379, including Tables, Figures. $12.50 cloth, $2.95 paper.)