Board of Governors of the Federal Reserve System (U.S.), 1935-. "Reserve Requirements of Depository Institutions," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1990," Annual Statistical Digest (November 1991) : 23-23. https://fraser.stlouisfed.org/title/7/item/23496/toc/252078 , accessed on April 23, 2024.