Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Total Nonfarm Business Expenditures on New Plant and Equipment," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "March 1981," Federal Reserve Bulletin (March 1981) : 111-111. https://fraser.stlouisfed.org/title/62/item/20475/toc/89578 , accessed on May 8, 2024.