Currency manipulation and its effect on U.S. businesses and workers : hearing before the Subcommittee on Trade of the Committee on Ways and Means, U.S. House of Representatives, joint with the Subcommittee on Commerce, Trade, and Consumer Protection of the Committee on Energy and Commerce and the Subcommittee on Domestic and International Monetary Policy, Trade, and Technology of the Committee on Financial Services, U.S. House of Representatives, One Hundred Tenth Congress, first session, May 9, 2007. (U.S. G.P.O., 2009)