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An Evaluation of the bumper standard as modified in 1982

LaHeist, Warren G.
Washington, D.C. : U.S. Dept. of Transportation, National Highway Traffic Safety Administration, [1987] 1987

Highway safety assessment a summary of findings in ten states

LaHeist, Warren G.
Washington, D.C. : U.S. Dept. of Transportation, National Highway Traffic Safety Administration, [1998] 1998