Commercial airline safety oversight [electronic resource] : hearing before the Subcommittee on Aviation Operations, Safety, and Security of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Twelfth Congress, second session, March 20, 2012.
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Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2012.