
    No. 79-1384.
    No. 79-1394.
    No. 79-1395.
    Exxon Corp. v. United States; Shell Oil Co. v. United States; and Marathon Oil Co. v. United States.
   C. A. D. C. Cir. Certiorari denied. Reported below: 202 U. S. App. D. C. 70, 628 F. 2d 70.  