Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Factory Employment (Adjusted for Seasonal Variation)," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "September 1948," Federal Reserve Bulletin (September 1948) : 115-115. https://fraser.stlouisfed.org/title/62/item/21165/toc/157302 , accessed on March 28, 2024.