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