Federal Reserve Bank of Chicago. "[Federal Reserve Bank of Chicago and the Detroit Branch Will Not Operate Check Collection Departments on December 26, 1970 and January 2, 1971], Circular No. 2134" in Federal Reserve Bank of Chicago Bulletins and Circular Letters
(December 8, 1970).
https://fraser.stlouisfed.org/title/7180/item/661183, accessed on November 15, 2025.