Board of Governors of the Federal Reserve System (U.S.), 1935-. "Approval of applications of First Bank System, Inc., and Central Bancorporation, Inc., to acquire Colorado National Bankshares, Inc." in Press Releases of the Board of Governors of the Federal Reserve System (March 29, 1993). https://fraser.stlouisfed.org/title/9237/item/692617, accessed on January 13, 2026.