Board of Governors of the Federal Reserve System (U.S.), 1935-. "Output, Capacity, and Capacity Utilization," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1990," Annual Statistical Digest (November 1991) : 80-81. https://fraser.stlouisfed.org/title/7/item/23496/toc/252115 , accessed on May 4, 2024.