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. "August 1925," Federal Reserve Bulletin (August 1925) : 50-50. https://fraser.stlouisfed.org/title/62/item/20575/toc/87070 , accessed on April 19, 2024.