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 25, 1987 : Annual Revisions," Z.1 Financial Accounts of the United States (1987-09-25) : 12-12. https://fraser.stlouisfed.org/title/93/item/69087/toc/483660 , accessed on April 25, 2024.