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-. "1993," Annual Statistical Digest (November 1994) : 120-120. https://fraser.stlouisfed.org/title/7/item/23499/toc/428197 , accessed on April 19, 2024.