Board of Governors of the Federal Reserve System (U.S.), 1935-. "Selected Interest Rates (Weeks Ending Wednesdays)," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "June 20, 1988," H.15 Selected Interest Rates (1988-06-20) : 2-2. https://fraser.stlouisfed.org/title/86/item/67564/toc/463861 , accessed on April 25, 2024.