Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Reserve Ratio of 12 Federal Reserve Districts," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1921," Federal Reserve Bulletin (May 1921) : 12-12. https://fraser.stlouisfed.org/title/62/item/20523/toc/260848 , accessed on March 29, 2024.