Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "National Summary of Business Conditions," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "December 1955," Federal Reserve Bulletin (December 1955) : 19-20. https://fraser.stlouisfed.org/title/62/item/21252/toc/326042 , accessed on April 25, 2024.