D. Colorado August 1972 casesCurtis, Inc. v. United StatesHanley v. Four Corners Vacation Properties, Inc.United States v. El Paso Natural Gas Co.California Car Wash Systems, Inc. v. Danco, Inc.W.C. James, Inc. v. Phillips Petroleum CompanyAllen v. Pipefitters Local Union No. 208, of Denver, Colorado of United Ass'n of Journeymen and Apprentices of Plumbing and Pipe Fitting Industry of U.S. and Canada (AFL-CIO)Lederman Enterprises, Inc. v. Westinghouse Credit Corp.Almarez v. Carpenter