Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "January 17, 1978," G.12.3 Industrial Production (1978-01-17) : 6-6. https://fraser.stlouisfed.org/title/55/item/59607/toc/470316 , accessed on May 1, 2024.