
    No. 91-17.
    Estate of Cowart v. Nicklos Drilling Co. et al.
   C. A. 5th Cir. [Certiorari granted, 502 U. S. 1008.] Motions of Petroleum Helicopters, Inc., et al. and National Association of Stevedores et al. for leave to file briefs as amici curiae granted.  