Board of Governors of the Federal Reserve System (U.S.), 1935-. "Seasonally Adjusted and Percentage Change Summary," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "May 15, 1973," G.12.3 Industrial Production (1973-05-15) : 1-1. https://fraser.stlouisfed.org/title/55/item/59775/toc/471411 , accessed on May 14, 2024.