
    No. 351.
    United Construction Workers et al. v. National Labor Relations Board.
    
      Yelverton Cowherd, Hillis Townsend and M. E. Boiarsky for petitioners.
    
      Acting Solicitor General Stern, George J. Bott, David P. Findling, Mozart G. Rat-ner and Bernard Dunau for respondent.
   C. A. 4th Cir. Certiorari denied.  