Board of Governors of the Federal Reserve System (U.S.), 1935-. "Footnotes," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "April 1, 1991," H.15 Selected Interest Rates (1991-04-01) : 2-2. https://fraser.stlouisfed.org/title/86/item/67255/toc/464192 , accessed on April 17, 2024.