Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Statist Index Number of Wholesale Prices," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "January 1921," Federal Reserve Bulletin (January 1921) : 82-82. https://fraser.stlouisfed.org/title/62/item/20609/toc/250382 , accessed on March 29, 2024.