Human factors requirements for real-time motorist information displays. Volume 4: bibliography and selected annotations: visual systems. Final report.

Federal Highway Administration, Office of Research, Washington, D.C.

U.S. policy in El Salvador : hearings before the Subcommittees on Human Rights and International Organizations and on Western Hemisphere Affairs of the Committee on Foreign Affairs, House of Representatives, Ninety- eighth Congress, first session ... February 4, 28; March 7, 17, 1983.

Mode of access: Internet.