Board of Governors of the Federal Reserve System (U.S.), 1935-. "Profit Taxes Payable, Seasonally Adjusted Annual Rates," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "June 7, 1988," Z.1 Financial Accounts of the United States (1988-06-07) : 53-53. https://fraser.stlouisfed.org/title/93/item/69049/toc/484109 , accessed on April 25, 2024.