U.S. policy toward the United Nations Conference on Environment and Development [electronic resource] : joint hearings before the Committee on Foreign Affairs and its Subcommittees on Arms Control, International Security, and Science and Human Rights and International Organizations and the Subcommittee on Oceanography, Great Lakes, and the Outer Continental Shelf of the Committee on Merchant Marines and Fisheries, House of Representatives, One Hundred Second Congress, second session, February 26, 1992, February 27, 1992, July 21, 1992, July 28, 1992.