Board of Governors of the Federal Reserve System (U.S.), 1935-. "Charts," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "October 19, 1987," G.3 Capacity Utilization, Manufacturing, Mining, Utilities and Industrial Materials (1987-10-19) : 2-2. https://fraser.stlouisfed.org/title/51/item/56847/toc/448401 , accessed on April 23, 2024.