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-. "1987," Annual Statistical Digest (October 1988) : 127-127. https://fraser.stlouisfed.org/title/7/item/23493/toc/193470 , accessed on April 26, 2024.