Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Estimated 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. "May 1948," Federal Reserve Bulletin (May 1948) : 74-74. https://fraser.stlouisfed.org/title/62/item/21161/toc/316665 , accessed on April 25, 2024.