Board of Governors of the Federal Reserve System (U.S.), 1935-. "Explanatory Note," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "September 16, 1993," G.17 Industrial Production and Capacity Utilization (1993-09-16) : 18-18. https://fraser.stlouisfed.org/title/77/item/63619/toc/455292 , accessed on April 18, 2024.