Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Group Index Numbers - United Kingdom, Statistics," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1920," Federal Reserve Bulletin (May 1920) : 66-66. https://fraser.stlouisfed.org/title/62/item/20601/toc/41229 , accessed on April 18, 2024.