Board of Governors of the Federal Reserve System (U.S.), 1935-. "Text," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "April 18, 1988," G.3 Capacity Utilization, Manufacturing, Mining, Utilities and Industrial Materials (1988-04-18) : 1-1. https://fraser.stlouisfed.org/title/51/item/56835/toc/448419 , accessed on April 23, 2024.