Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Subtotals and Individual Series, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "December 15, 1978," G.12.3 Industrial Production (1978-12-15) : 7-7. https://fraser.stlouisfed.org/title/55/item/59783/toc/470520 , accessed on April 24, 2024.