United States. President and Council of Economic Advisers (U.S.). "International Investment Position of the United States at Year-End," in United States. President and Council of Economic Advisers (U.S.). "2009," Economic Report of the President (2009) : 404-404. https://fraser.stlouisfed.org/title/45/item/8108/toc/350066 , accessed on May 5, 2024.