MD Pennsylvania November 1980 casesHornick v. Borough of DuryeaHockley v. Zent, Inc.Com. of Pa. Dept. of Environ. Res. v. WilliamsportMunicipal Auth., Etc. v. Com. of Pa., Etc.Pennsylvania Glass Sand v. Caterpillar Tractor Co.Lestrange v. Consolidated Rail Corp.