. . . . "Oversight of federal payment of interchange fees how to save taxpayer dollars : hearing before a subcommittee of the Committee on Appropriations, United States Senate, One Hundred Eleventh Congress, second session : special hearing, June 16, 2010, Washington, DC"@en . . . . . . . . . . "Oversight of federal payment of interchange fees : how to save taxpayer dollars : hearing before a subcommittee of the Committee on Appropriations, United States Senate, One Hundred Eleventh Congress, second session : special hearing, June 16, 2010, Washington, DC"@en . . . . . . . .