Board of Governors of the Federal Reserve System (U.S.), 1935-. "September 30, 1981," G.5 Foreign Exchange Rates (1981-09-30). https://fraser.stlouisfed.org/title/1281/item/51015, accessed on April 25, 2024.
Board of Governors of the Federal Reserve System (U.S.), 1935-. "September 30, 1981," G.5 Foreign Exchange Rates (1981-09-30). https://fraser.stlouisfed.org/title/1281/item/51015, accessed on April 25, 2024.