Federal Reserve Bank of Chicago. "[Summary of Semiannual Survey of Commercial Bank Participation in the Magnetic Ink Character Recognition Check Preprinting Program of the American Bankers Society], Circular No. 1808" in Federal Reserve Bank of Chicago Bulletins and Circular Letters (March 1, 1965). https://fraser.stlouisfed.org/title/7180/item/658980, accessed on December 4, 2024.