Government pension offset (GPO) and windfall elimination provision (WEP) : policies affecting pensions from work not covered by Social Security : hearing before the Subcommittee on Social Security, Pensions, and Family Policy of the Committee on Finance, United States Senate, One Hundred Tenth Congress, first session, November 6, 2007.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2007.