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-. "1973-1977," Annual Statistical Digest (December 1978) : 324-325. https://fraser.stlouisfed.org/title/7/item/23504/toc/110189 , accessed on April 19, 2024.