Federal Reserve Bank of Chicago. "[Summary of Semiannual Survey of Commercial Bank Participation in the Magnetic Ink Character Recognition Program of the American Bankers Association], Circular No. 1720" in Federal Reserve Bank of Chicago Bulletins and Circular Letters
(August 26, 1963).
https://fraser.stlouisfed.org/title/7180/item/658907, accessed on December 23, 2025.