Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Operating Ratios of Member Banks, by Federal Reserve District," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "June 1957," Federal Reserve Bulletin (June 1957) : 109-109. https://fraser.stlouisfed.org/title/62/item/21270/toc/427576 , accessed on March 28, 2024.