Board of Governors of the Federal Reserve System (U.S.), 1935-. "U.S. Government, Seasonally Adjusted Annual Rates," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "May 9, 1977," Z.1 Financial Accounts of the United States (1977-05-09) : 19-19. https://fraser.stlouisfed.org/title/93/item/69070/toc/477784 , accessed on December 5, 2023.