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-. "May 15, 1964," G.12.3 Industrial Production (1964-05-15) : 1-1. https://fraser.stlouisfed.org/title/55/item/59532/toc/486221 , accessed on April 25, 2024.