Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "International Price Indexes," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1920," Federal Reserve Bulletin (May 1920) : 59-63. https://fraser.stlouisfed.org/title/62/item/20601/toc/41259 , accessed on April 26, 2024.