Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Indexes of Industrial Activity," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "February 1924," Federal Reserve Bulletin (February 1924) : 39-39. https://fraser.stlouisfed.org/title/62/item/20557/toc/120863 , accessed on May 9, 2024.