Bullion coin programs of the United States Mint : can they be improved? : hearing before the Subcommittee on Domestic Monetary Policy and Technology of the Committee on Financial Services, U.S. House of Representatives, One Hundred Twelfth Congress, first session, April 7, 2011.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2011.