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-. "September 5, 1979 : Annual Revisions," Z.1 Financial Accounts of the United States (1979-09-05) : 10-10. https://fraser.stlouisfed.org/title/93/item/69130/toc/479907 , accessed on December 7, 2023.