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-. "July 15, 1983," G.12.3 Industrial Production (1983-07-15) : 20-20. https://fraser.stlouisfed.org/title/55/item/59669/toc/472618 , accessed on March 29, 2024.