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. "July 1956," Federal Reserve Bulletin (July 1956) : 29-30. https://fraser.stlouisfed.org/title/62/item/21259/toc/245373 , accessed on May 7, 2024.