Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industrial Production: Industry Groups," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "January 15, 1993," G.17 Industrial Production and Capacity Utilization (1993-01-15) : 6-7. https://fraser.stlouisfed.org/title/77/item/63605/toc/455137 , accessed on December 6, 2023.