To Amend the National Labor Relations Act, 1947: With Respect to the Building and Construction Industry. Hearings Before the Subcommittee on Labor and Labor-Management Relations of the Committee on Labor and Public Welfare, United States Senate, Eighty-second Congress, First Session, on S. 1973, a Bill to Amend the National Labor Relations Act, as Amended, with Reference to the Building and Construction Industry, and for Other Purposes ...