Board of Governors of the Federal Reserve System (U.S.), 1935-. "Diffusion Indexes," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "June 14, 1985," G.12.3 Industrial Production (1985-06-14) : 14-14. https://fraser.stlouisfed.org/title/55/item/59693/toc/473065 , accessed on April 23, 2024.