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-. "May 15, 1973," G.12.3 Industrial Production (1973-05-15) : 10-12. https://fraser.stlouisfed.org/title/55/item/59775/toc/471413 , accessed on March 29, 2024.