Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "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. "June 1971," Federal Reserve Bulletin (June 1971) : 175-175. https://fraser.stlouisfed.org/title/62/item/21438/toc/369568 , accessed on May 11, 2024.