Board of Governors of the Federal Reserve System (U.S.), 1935-. "Commercial paper outstanding," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1972-1976," Annual Statistical Digest (December 1977) : 349-350. https://fraser.stlouisfed.org/title/7/item/23503/toc/117711 , accessed on April 18, 2024.