Board of Governors of the Federal Reserve System (U.S.), 1935-. "Federal Fiscal and Financing Operations," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1972-1976," Annual Statistical Digest (December 1977) : 140-144. https://fraser.stlouisfed.org/title/7/item/23503/toc/117650 , accessed on March 28, 2024.