C. A. 10th Cir. [Certiorari granted, ante, p. 820.] Motions of Mountain States Legal Foundation, Salt River Project Agricultural Improvement and Power District et al., and Shell Oil Co. et al. for leave to file briefs as amici curiae granted. Motion of petitioners for divided argument granted. Request for additional time for oral argument denied.
Justice Stewart took no part in the consideration or decision of these motions.