Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Employment in Nonagricultural Establishments, by Industry Division," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "December 1974," Federal Reserve Bulletin (December 1974) : 139-139. https://fraser.stlouisfed.org/title/62/item/21480/toc/257910 , accessed on June 25, 2024.