US-VISIT : challenges and strategies for securing the U.S. border : hearing before the Subcommittee on Terrorism, Technology, and Homeland Security of the Committee on the Judiciary, United States Senate, One Hundred Tenth Congress, first session, January 31, 2007.
Imprint
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2007.