Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industrial Production, by Industries (Adjusted Indexes)," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "February 1938," Federal Reserve Bulletin (February 1938) : 83-83. https://fraser.stlouisfed.org/title/62/item/20998/toc/408591 , accessed on May 4, 2024.