Board of Governors of the Federal Reserve System (U.S.), 1935-. "Seasonally Adjusted Indexes," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1985 Revision," G.12.3 Industrial Production (1985-01-01) : 3-17. https://fraser.stlouisfed.org/title/55/item/59687/toc/492566 , accessed on April 25, 2024.