Board of Governors of the Federal Reserve System (U.S.), 1935-. "Issuance of determination relating to the divestiture by United Rock Construction, Inc., of Cass Mining Company" in Press Releases of the Board of Governors of the Federal Reserve System
(July 17, 1980).
https://fraser.stlouisfed.org/title/9237/item/695070, accessed on April 2, 2026.