Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Merchandise Exports and Imports," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "March 1931," Federal Reserve Bulletin (March 1931) : 20-20. https://fraser.stlouisfed.org/title/62/item/20711/toc/174300 , accessed on May 13, 2024.