Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Subtotals and Individual Series, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "September 16, 1977," G.12.3 Industrial Production (1977-09-16) : 9-9. https://fraser.stlouisfed.org/title/55/item/59604/toc/470242 , accessed on May 4, 2024.