Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industry Groupings, Without Seasonal Adjustment," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "October 1961," Federal Reserve Bulletin (October 1961) : 100-100. https://fraser.stlouisfed.org/title/62/item/21322/toc/391999 , accessed on May 3, 2024.