Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industry Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "March 1965," Federal Reserve Bulletin (March 1965) : 123-123. https://fraser.stlouisfed.org/title/62/item/21363/toc/409268 , accessed on April 19, 2024.