Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industrial Production: Industry Subtotals and Individual Series," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "April 15, 1992," G.17 Industrial Production and Capacity Utilization (1992-04-15) : 12-15. https://fraser.stlouisfed.org/title/77/item/63602/toc/454995 , accessed on May 4, 2024.