Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industry Groupings, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "November 1970," Federal Reserve Bulletin (November 1970) : 130-130. https://fraser.stlouisfed.org/title/62/item/21431/toc/330890 , accessed on March 29, 2024.