Board of Governors of the Federal Reserve System (U.S.), 1935-. "Member Bank Income Ratios," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1972-1976," Annual Statistical Digest (December 1977) : 333-338. https://fraser.stlouisfed.org/title/7/item/23503/toc/117707 , accessed on April 21, 2024.