Federal Reserve Bank of Chicago. "[Computation of Deficiencies Eligible for Waiver of Penalty Under Amendments to Regulation D, Reserves of Member Banks, and Regulation J, Collection of Checks and Other Items by Federal Reserve Banks]" in Federal Reserve Bank of Chicago Bulletins and Circular Letters (August 7, 1972). https://fraser.stlouisfed.org/title/7180/item/666418, accessed on January 31, 2025.