Board of Governors of the Federal Reserve System (U.S.), 1935-. "Selected Interest Rates," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "April 20, 1981," H.15 Selected Interest Rates (1981-04-20) : 1-1. https://fraser.stlouisfed.org/title/86/item/67502/toc/463078 , accessed on May 8, 2024.