Board of Governors of the Federal Reserve System (U.S.), 1935-. "Capacity Utilization : Manufacturing, Mining, and Utilities and Industrial Materials, January 1967-December 1984," G.3 Capacity Utilization, Manufacturing, Mining, Utilities and Industrial Materials (July 1985). https://fraser.stlouisfed.org/title/51/item/528864, accessed on March 17, 2025.