Board of Governors of the Federal Reserve System (U.S.), 1935-. "Debt of federal and federally sponsored credit agencies," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1970-1979," Annual Statistical Digest (March 1981) : 247-252. https://fraser.stlouisfed.org/title/7/item/23506/toc/190715 , accessed on May 4, 2024.