Federal Reserve Bank of Dallas. "[Keller State Bank, Keller, Texas, Newly Organized Nonmember Bank Opened for Business August 26, 1971], Circular No. 71-211," District Notices (Federal Reserve Bank of Dallas) (August 31, 1971). https://fraser.stlouisfed.org/title/5569/item/543337, accessed on March 25, 2025.