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. "October 1931," Federal Reserve Bulletin (October 1931) : 12-12. https://fraser.stlouisfed.org/title/62/item/20718/toc/313918 , accessed on March 28, 2024.