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. "October 1925," Federal Reserve Bulletin (October 1925) : 34-34. https://fraser.stlouisfed.org/title/62/item/20577/toc/247781 , accessed on May 7, 2024.