Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Index of Production in Basic Industries," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "September 1925," Federal Reserve Bulletin (September 1925) : 78-78. https://fraser.stlouisfed.org/title/62/item/20576/toc/414011 , accessed on March 29, 2024.