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-. "September 16, 1964," G.12.3 Industrial Production (1964-09-16) : 1-1. https://fraser.stlouisfed.org/title/55/item/59550/toc/486751 , accessed on March 29, 2024.