Board of Governors of the Federal Reserve System (U.S.), 1935-. "Footnotes," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "December 31, 1990," H.15 Selected Interest Rates (1990-12-31) : 2-2. https://fraser.stlouisfed.org/title/86/item/67223/toc/464162 , accessed on April 25, 2024.