National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, & National Research Council (U.S.). Committee on Communications and Committee on Motorist Services. (1972). Emergency communications: 5 reports prepared for the 51st Annual Meeting. Highway Research Board.
Cita Chicago Style (17a ed.)National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, y National Research Council (U.S.). Committee on Communications and Committee on Motorist Services. Emergency Communications: 5 Reports Prepared for the 51st Annual Meeting. Washington: Highway Research Board, 1972.
Cita MLA (9a ed.)National Research Council (U.S.). Highway Research Board, et al. Emergency Communications: 5 Reports Prepared for the 51st Annual Meeting. Highway Research Board, 1972.