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-. "May 15, 1978," Z.1 Financial Accounts of the United States (1978-05-15) : 9-9. https://fraser.stlouisfed.org/title/93/item/69072/toc/479220 , accessed on May 9, 2024.