United States. President and Council of Economic Advisers (U.S.). "U.S. International Trade in Goods, by Principal End-Use Category," in United States. President and Council of Economic Advisers (U.S.). "2008," Economic Report of the President (2008) : 345-345. https://fraser.stlouisfed.org/title/45/item/8107/toc/362194 , accessed on May 1, 2024.