Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industrial Production Indexes 1980," G.12.3 Industrial Production (1981-09-01). https://fraser.stlouisfed.org/title/55/item/59611, accessed on April 19, 2024.
Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industrial Production Indexes 1980," G.12.3 Industrial Production (1981-09-01). https://fraser.stlouisfed.org/title/55/item/59611, accessed on April 19, 2024.