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-. "1974-1978," Annual Statistical Digest (January 1980) : 192-194. https://fraser.stlouisfed.org/title/7/item/23505/toc/133580 , accessed on April 19, 2024.