Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Average Monthly Wholesale Prices of Commodities," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "June 1921," Federal Reserve Bulletin (June 1921) : 64-66. https://fraser.stlouisfed.org/title/62/item/20524/toc/363269 , accessed on May 11, 2024.