United States. President and Council of Economic Advisers (U.S.). "Gross National Product: Receipts and Expenditures by Major Economic Groups," in United States. President and Council of Economic Advisers (U.S.). "1961," Economic Report of the President (1961) : 148-149. https://fraser.stlouisfed.org/title/45/item/8132/toc/400416 , accessed on April 24, 2024.