Board of Governors of the Federal Reserve System (U.S.), 1935-. "Summary Groupings, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "January 17, 1979," G.12.3 Industrial Production (1979-01-17) : 13-13. https://fraser.stlouisfed.org/title/55/item/59616/toc/470537 , accessed on May 3, 2024.