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. "March 1983," Federal Reserve Bulletin (March 1983) : 171-171. https://fraser.stlouisfed.org/title/62/item/20497/toc/263926 , accessed on April 19, 2024.