WD Pennsylvania August 1980 casesU.S. v. Employers Mut. Liability Ins. Co. of Wis.L.D. Schreiber Cheese v. Clearfield CheesePension Ben. Guaranty Corp. v. GreeneTimblin v. HarrisPymatuning Water Shed Citizens for a Hygienic Environment v. EatonDel Boring Tire Serv. v. Federal Emergency, Etc.United States v. WalkerHaas v. Pittsburgh National Bank