Federal Reserve Bank of Chicago. "[City National Bank of Rockford, Rockford, Illinois Changed Its Title to City National Bank & Trust Co. of Rockford, Rockford, Illinois], Circular No. 1628" in Federal Reserve Bank of Chicago Bulletins and Circular Letters (April 3, 1961). https://fraser.stlouisfed.org/title/7180/item/658812, accessed on March 12, 2025.