Board of Governors of the Federal Reserve System (U.S.), 1935-. "Total Net Purchases, Unadjusted Net Flows," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "September 25, 1987 : Annual Revisions," Z.1 Financial Accounts of the United States (1987-09-25) : 47-47. https://fraser.stlouisfed.org/title/93/item/69087/toc/483576 , accessed on May 7, 2024.