Board of Governors of the Federal Reserve System (U.S.), 1935-. "Income and Product Accounts: GNP Expenditures and Gross Saving," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "August 30, 1978 : Revisions for 1972-77," Z.1 Financial Accounts of the United States (1978-08-30) : 9-9. https://fraser.stlouisfed.org/title/93/item/69132/toc/479244 , accessed on April 17, 2024.