America's agricultural labor crisis : enacting a practical solution : hearing before the Subcommittee on Immigration, Refugees and Border Security of the Committee on the Judiciary, United States Senate, One Hundred Twelfth Congress, first session, October 4, 2011.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2012.