Board of Governors of the Federal Reserve System (U.S.), 1935-. "Foreign Exchange Rates," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1981," Annual Statistical Digest (October 1982) : 167-167. https://fraser.stlouisfed.org/title/7/item/23508/toc/396213 , accessed on April 18, 2024.