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-. "July 15, 1975," G.12.3 Industrial Production (1975-07-15) : 5-7. https://fraser.stlouisfed.org/title/55/item/59533/toc/469996 , accessed on April 22, 2024.