
    No. 81-150.
    No. 81-546.
    Northern Pipeline Construction Co. v. Marathon Pipe Line Co. et al.; and United States v. Marathon Pipe Line Co. et al.
   D. C. Minn. [Probable jurisdiction noted, 454 U. S. 1029.] Motion of Commercial Law League of America for leave to participate in oral argument as amicus curiae and for additional time for oral argument denied.  