C. A. 4th Cir. [Certiorari granted, 440 U. S. 957.] Motions of Chamber of Commerce of the United States, Washington Legal Foundation, and Bituminous Coal Operators’ Association, Inc., for leave to file briefs as amici curiae granted.
C. A. 4th Cir. [Certiorari granted, 440 U. S. 957.] Motions of Chamber of Commerce of the United States, Washington Legal Foundation, and Bituminous Coal Operators’ Association, Inc., for leave to file briefs as amici curiae granted.