Federal Reserve Bank of Chicago. "Re: Exchanges of Interim Certificates of 2 1/2% Treasury Bonds of 1967-72 for Definitive Coupon Bonds" in Federal Reserve Bank of Chicago Bulletins and Circular Letters
(January 2, 1942).
https://fraser.stlouisfed.org/title/7180/item/658203, accessed on September 10, 2024.