Oversight of motor carrier safety efforts [electronic resource] : hearing before the Subcommittee on Surface Transportation and Merchant Marine Infrastructure, Safety, and Security of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Eleventh Congress, second session, April 28, 2010.
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Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2011.