Board of Governors of the Federal Reserve System (U.S.), 1935-. "Treasury Currency and SDR Certificates, Seasonally Adjusted Annual Rates," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "September 23, 1985 : Annual Revisions," Z.1 Financial Accounts of the United States (1985-09-23) : 39-39. https://fraser.stlouisfed.org/title/93/item/69123/toc/482420 , accessed on April 26, 2024.