National Research Council (U.S.). Highway Research Board & National Research Council (U.S.). Transportation Research Board. (1975). New transportation systems: 7 reports prepared for the 53rd annual meeting of the Highway Research Board. Transportation Research Board, National Research Council.
Cita Chicago (17th ed.)National Research Council (U.S.). Highway Research Board i National Research Council (U.S.). Transportation Research Board. New Transportation Systems: 7 Reports Prepared for the 53rd Annual Meeting of the Highway Research Board. Washington: Transportation Research Board, National Research Council, 1975.
Cita MLA (9th ed.)National Research Council (U.S.). Highway Research Board i National Research Council (U.S.). Transportation Research Board. New Transportation Systems: 7 Reports Prepared for the 53rd Annual Meeting of the Highway Research Board. Transportation Research Board, National Research Council, 1975.