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United States. Department of Homeland Security. Office of Inspector General, author.
Washington, DC : Office of Inspector General, Department of Homeland Security, 2013.
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United States. Congress. House. Committee on Homeland Security. Subcommittee on Transportation Security and Infrastructure Protection.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2009
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