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-. "June 16, 1966," G.12.3 Industrial Production (1966-06-16) : 1-1. https://fraser.stlouisfed.org/title/55/item/59806/toc/487618 , accessed on March 28, 2024.