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-. "February 15, 1974," G.12.3 Industrial Production (1974-02-15) : 5-7. https://fraser.stlouisfed.org/title/55/item/59623/toc/471490 , accessed on March 28, 2024.