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-. "June 14, 1972," G.12.3 Industrial Production (1972-06-14) : 1-1. https://fraser.stlouisfed.org/title/55/item/59732/toc/469959 , accessed on May 3, 2024.