Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Subtotals and Individual Series, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "May 15, 1987," G.12.3 Industrial Production (1987-05-15) : 7-7. https://fraser.stlouisfed.org/title/55/item/59719/toc/473791 , accessed on March 29, 2024.