Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Value of Exports and Imports of Selected Commodities at 1913 Prices," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "September 1920," Federal Reserve Bulletin (September 1920) : 61-61. https://fraser.stlouisfed.org/title/62/item/20605/toc/366440 , accessed on April 19, 2024.