Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Purchasing Power Parities and Average Monthly Rates of Exchange," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "September 1923," Federal Reserve Bulletin (September 1923) : 33-33. https://fraser.stlouisfed.org/title/62/item/20552/toc/71982 , accessed on April 18, 2024.