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 13, 1985," G.12.3 Industrial Production (1985-09-13) : 19-19. https://fraser.stlouisfed.org/title/55/item/59696/toc/473127 , accessed on April 18, 2024.