Board of Governors of the Federal Reserve System (U.S.), 1935-. "Federal Debt Subject to Statutory Limitation," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1986," Annual Statistical Digest (November 1987) : 100-100. https://fraser.stlouisfed.org/title/7/item/23492/toc/288794 , accessed on April 25, 2024.