Board of Governors of the Federal Reserve System (U.S.), 1935-. "Approval of applications of Northwest Bancorporation for Bettendorf Bank and Trust Company and Security State Bank" in Press Releases of the Board of Governors of the Federal Reserve System
(August 2, 1973).
https://fraser.stlouisfed.org/title/9237/item/699250, accessed on January 16, 2026.