Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Subtotals and Individual Series, Seasonally Adjusted and Unadjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "October 17, 1972," G.12.3 Industrial Production (1972-10-17) : 4-7. https://fraser.stlouisfed.org/title/55/item/59703/toc/471371 , accessed on March 29, 2024.