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. "April 1992," Federal Reserve Bulletin (April 1992) : 127-127. https://fraser.stlouisfed.org/title/62/item/20839/toc/351913 , accessed on May 4, 2024.