
    No. 76-1560.
    United States v. United States Gypsum Co. et al.
   C. A. 3d Cir. [Certiorari granted, 434 U. S. 815.] Motion of respondents Colon Brown et al. for leave to file supplemental brief after argument granted. Mr. Justice Blackmun took no part in the consideration or decision of this motion.  