Board of Governors of the Federal Reserve System (U.S.), 1935-. "Diffusion Indexes of Industrial Production," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "April 15, 1992," G.17 Industrial Production and Capacity Utilization (1992-04-15) : 15-15. https://fraser.stlouisfed.org/title/77/item/63602/toc/455005 , accessed on April 25, 2024.