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 16, 1987," G.12.3 Industrial Production (1987-11-16) : 20-20. https://fraser.stlouisfed.org/title/55/item/59725/toc/473917 , accessed on April 30, 2024.