Board of Governors of the Federal Reserve System (U.S.), 1935-. "All Nonfinancial Businesses, Seasonally Adjusted Annual Rates," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "January 31, 1992 : Annual Revisions," Z.1 Financial Accounts of the United States (1992-01-31) : 22-22. https://fraser.stlouisfed.org/title/93/item/69077/toc/468495 , accessed on May 11, 2024.