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. "December 1924," Federal Reserve Bulletin (December 1924) : 52-52. https://fraser.stlouisfed.org/title/62/item/20567/toc/260304 , accessed on June 21, 2024.