Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Index Numbers of Wholesale Prices," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "February 1921," Federal Reserve Bulletin (February 1921) : 69-69. https://fraser.stlouisfed.org/title/62/item/20520/toc/377136 , accessed on April 25, 2024.