MD Pennsylvania November 1971 casesU.S. v. 137.02 Acres of Land, Etc., Cmwlth. of Pa.Aviation Associates of Puerto Rico v. Dixon CompanyUnited States v. AhmadMinersville Coal Co. v. Anthracite Export Ass'nHerman v. C. O. Porter Machinery Co.Servomation Mathias, Inc. v. EnglertPowell v. Kull