Board of Governors of the Federal Reserve System (U.S.), 1935-. "Approval of applications of Banc One Corporation and Banc One Oklahoma Corporation to acquire Central Banking Group, Inc. and Central Financial Life Insurance Company, Inc., and engage in sale of credit related insurance" in Press Releases of the Board of Governors of the Federal Reserve System
(September 23, 1993).
https://fraser.stlouisfed.org/title/9237/item/692749, accessed on January 21, 2026.