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-. "June 15, 1973," G.12.3 Industrial Production (1973-06-15) : 10-12. https://fraser.stlouisfed.org/title/55/item/59769/toc/471425 , accessed on April 26, 2024.