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Dyfyniad Arddull ChicagoNational Cooperative Highway Research Program, National Research Council (U.S.). Transportation Research Board, American Association of State Highway and Transportation Officials, and Nicholas D. Antonucci. Guidance for Implementation of the AASHTO Strategic Highway Safety Plan. Washington, D.C: Transportation Research Board, 2005.
Dyfyniad MLANational Cooperative Highway Research Program, et al. Guidance for Implementation of the AASHTO Strategic Highway Safety Plan. Transportation Research Board, 2005.