Nuclear proliferation factbook / prepared for the Subcommittees on Arms Control, International Security, and Science and on International Economic Policy and Trade of the Committee on Foreign Affairs, U.S. House of Representatives and the Subcommittee on Energy, Nuclear Proliferation, and Federal [i.e. Government] Processes of the Committee on Governmental Affairs, U.S. Senate ; by the Environment and Natural Resources Policy Division, Congressional Research Service, Library of Congress.