
    No. 515.
    United States et al. v. Gifford-Hill-American, Inc., et al.
    
      Solicitor General Griswold and Assistant Attorney General McLaren for petitioners. Stanley E. Neely for Gifford-Hill-American, Inc., and Julian O. von Kalinowski for United Concrete Pipe Corp., respondents.
   C. A. 5th Cir. Certiorari granted.  