Utah Copper Company. United States circuit court of appeals for 10th circuit, no. 2456, Utah Copper Company, Bingham and Garfield Railway Company, and Kennecott Copper Company v. Railroad Retirement Board, Railway Labor Executives Association, and Brotherhood of Railroad Trainmen; no. 2457, Nevada Consolidated Copper Corporation, Nevada Northern Railway Company, and Kennecott Copper Corporation v. [same]; brief of appellee.