Board of Governors of the Federal Reserve System (U.S.), 1935-. "Approval of application of FrostBank Corporation to continue to engage in lending activities through its subsidiary, Main Plaza Corporation" in Press Releases of the Board of Governors of the Federal Reserve System
(October 5, 1976).
https://fraser.stlouisfed.org/title/9237/item/693685, accessed on January 24, 2026.