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. "March 1921," Federal Reserve Bulletin (March 1921) : 60-60. https://fraser.stlouisfed.org/title/62/item/20521/toc/249241 , accessed on May 3, 2024.