Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Index Numbers of Wholesale Prices in United States - Federal Reserve Board," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "October 1920," Federal Reserve Bulletin (October 1920) : 76-76. https://fraser.stlouisfed.org/title/62/item/20606/toc/62360 , accessed on April 19, 2024.