Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industrial Production: Market Groups," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "April 15, 1994," G.17 Industrial Production and Capacity Utilization (1994-04-15) : 4-5. https://fraser.stlouisfed.org/title/77/item/63626/toc/455485 , accessed on April 19, 2024.