Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industrial Production," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1984," Annual Statistical Digest (October 1985) : 139-140. https://fraser.stlouisfed.org/title/7/item/23511/toc/37413 , accessed on June 28, 2024.