Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Nonfinancial Business Activity - Selected Measures," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "October 1997," Federal Reserve Bulletin (October 1997) : 107-107. https://fraser.stlouisfed.org/title/62/item/20904/toc/254470 , accessed on April 25, 2024.