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-. "June 5, 1987," Z.1 Financial Accounts of the United States (1987-06-05) : 41-41. https://fraser.stlouisfed.org/title/93/item/69104/toc/483438 , accessed on May 4, 2024.