Board of Governors of the Federal Reserve System (U.S.), 1935-. "Capacity Utilization: Manufacturing, Mining, and Utilities," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "February 15, 1991," G.17 Industrial Production and Capacity Utilization (1991-02-15) : 8-8. https://fraser.stlouisfed.org/title/77/item/63587/toc/454768 , accessed on December 7, 2023.