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-. "March 15, 1977," G.12.3 Industrial Production (1977-03-15) : 11-13. https://fraser.stlouisfed.org/title/55/item/59602/toc/470169 , accessed on May 1, 2024.