Board of Governors of the Federal Reserve System (U.S.), 1935-. "Seasonally Adjusted and Unadjusted Summary," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "July 15, 1970," G.12.3 Industrial Production (1970-07-15) : 1-1. https://fraser.stlouisfed.org/title/55/item/59770/toc/468000 , accessed on April 23, 2024.