Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industry Groupings, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "August 1960," Federal Reserve Bulletin (August 1960) : 77-77. https://fraser.stlouisfed.org/title/62/item/21308/toc/142838 , accessed on May 3, 2024.