Federal Reserve Bank of Chicago. "Delivery of Certificates of Indebtedness Dated April 22, 1918, Maturing July 18, 1918, Circular no. 79A" in Federal Reserve Bank of Chicago Bulletins and Circular Letters (May 2, 1918). https://fraser.stlouisfed.org/title/7180/item/655430, accessed on September 10, 2024.