. . . . . "The future of Union Station National Visitor Center Act Amendments of 1981 : hearing before the Subcommittee on Public Buildings and Grounds of the Committee on Public Works and Transportation, House of Representatives, Ninety-seventh Congress, first session, December 10, 1981"@en . "The future of Union Station : National Visitor Center Act Amendments of 1981 : hearing before the Subcommittee on Public Buildings and Grounds of the Committee on Public Works and Transportation, House of Representatives, Ninety-seventh Congress, first session, December 10, 1981"@en . . . . . . . . .