Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Foreign Exchange Rates," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "September 1991," Federal Reserve Bulletin (September 1991) : 156-156. https://fraser.stlouisfed.org/title/62/item/20832/toc/184488 , accessed on May 9, 2024.