Board of Governors of the Federal Reserve System (U.S.), 1935-. "Approval of applications of SPC/CBSI Acquisition, Inc., a subsidiary of Security Pacific Corporation, to acquire Southwest Bancorp" in Press Releases of the Board of Governors of the Federal Reserve System (September 18, 1989). https://fraser.stlouisfed.org/title/9237/item/691628, accessed on January 19, 2026.