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-. "November 14, 1989," G.12.3 Industrial Production (1989-11-14) : 20-20. https://fraser.stlouisfed.org/title/55/item/59754/toc/474657 , accessed on May 4, 2024.