United States. President and Council of Economic Advisers (U.S.). "Interest-Bearing Public Debt Securities by Kind of Obligation," in United States. President and Council of Economic Advisers (U.S.). "1993," Economic Report of the President (1993) : 445-445. https://fraser.stlouisfed.org/title/45/item/8092/toc/317927 , accessed on March 19, 2024.