Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Earnings Ratios of All Member Banks, by Classes," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1961," Federal Reserve Bulletin (May 1961) : 99-99. https://fraser.stlouisfed.org/title/62/item/21317/toc/52880 , accessed on April 24, 2024.