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. "November 1971," Federal Reserve Bulletin (November 1971) : 152-152. https://fraser.stlouisfed.org/title/62/item/21443/toc/148470 , accessed on April 24, 2024.