Board of Governors of the Federal Reserve System (U.S.), 1935-. "Approval of applications of First Commercial Corporation, Arvest Bank Group, Inc., and TRH Bank Group, Inc. to acquire Oklahoma National Bank of Duncan. Approval for TRH Oklahoma, Inc. to become a bank holding company" in Press Releases of the Board of Governors of the Federal Reserve System
(November 6, 1996).
https://fraser.stlouisfed.org/title/9237/item/700560, accessed on January 16, 2026.