Federal Reserve Bank of St. Louis. "[Announcement Regarding Arvest Bank Group Inc., Bentonville, Arkansas; Ameribank Corporation, Shawnee, Oklahoma; United Oklahoma Bancshares, Inc., Del City, Oklahoma; United Bank, Oklahoma City, Oklahoma; Arvest United Bank, A State Savings Bank.]," Federal Reserve Bank of St. Louis News Releases (July 21, 1999). https://fraser.stlouisfed.org/title/6265/item/654492, accessed on September 14, 2024.