Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Balance Sheet of the Swiss National Bank," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "April 1931," Federal Reserve Bulletin (April 1931) : 30-30. https://fraser.stlouisfed.org/title/62/item/20712/toc/195913 , accessed on May 4, 2024.