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. "January 2002," Federal Reserve Bulletin (January 2002) : 110-110. https://fraser.stlouisfed.org/title/62/item/20956/toc/221609 , accessed on April 23, 2024.