Board of Governors of the Federal Reserve System (U.S.), 1935-. "Market Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "June 15, 1973," G.12.3 Industrial Production (1973-06-15) : 8-8. https://fraser.stlouisfed.org/title/55/item/59769/toc/471419 , accessed on April 18, 2024.