U. S. Steel Corp. v. United Mine Workers of America Local 2300673 F.2d 1304 3rd Cir.1981Check TreatmentCheck Treatment673 F.2d 1304 U. S. Steel Corp.v.United Mine Workers of America local 2300 81-1597 UNITED STATES COURT OF APPEALS Third Circuit 1/20/81 1 W.D.Pa. AFFIRMED