Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industry Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "July 1964," Federal Reserve Bulletin (July 1964) : 89-89. https://fraser.stlouisfed.org/title/62/item/21355/toc/38343 , accessed on March 28, 2024.