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Cita Chicago (17th ed.)National Research Council (U.S.). Highway Research Board. Problems in Implementing Roadway Pricing: 5 Reports Prepared for the 53rd Annual Meeting of the Highway Research Board. Washington: Transportation Research Board, National Research Council, 1974.
Cita MLA (9th ed.)National Research Council (U.S.). Highway Research Board. Problems in Implementing Roadway Pricing: 5 Reports Prepared for the 53rd Annual Meeting of the Highway Research Board. Transportation Research Board, National Research Council, 1974.