Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industrial Production, by Industries (Unadjusted Indexes)," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "October 1937," Federal Reserve Bulletin (October 1937) : 72-72. https://fraser.stlouisfed.org/title/62/item/20994/toc/353656 , accessed on April 23, 2024.