Board of Governors of the Federal Reserve System (U.S.), 1935-. "Bond Prices, by Type of Issuer," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1972-1976," Annual Statistical Digest (December 1977) : 352-353. https://fraser.stlouisfed.org/title/7/item/23503/toc/117714 , accessed on March 29, 2024.