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-. "June 16, 1993," G.17 Industrial Production and Capacity Utilization (1993-06-16) : 6-7. https://fraser.stlouisfed.org/title/77/item/63616/toc/455217 , accessed on April 23, 2024.