Federal Reserve Bank of Chicago. "Order of the Secretary of the Treasury Supplementing the Order of December 28, 1933, Regarding the Delivery of Gold Coin, Gold Bullion, and Gold Certificates to the Treasurer of the United States" in Federal Reserve Bank of Chicago Bulletins and Circular Letters (January 15, 1934). https://fraser.stlouisfed.org/title/7180/item/655760, accessed on February 16, 2025.