A collection of papers prepared for the 1992 meeting of the American Association for the Advancement of Science, this volume has two particular strengths. It covers a wide range of technologies, including biological, ballistic and advanced conventional arms, as well as nuclear weapons. Second, more than the usual emphasis is given to arms proliferation by developing countries. Some of the more interesting contributions are written by specialists from India, Pakistan, Israel and China. There are also some timely chapters on implications for American nonproliferation policy.