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. "December 1966," Federal Reserve Bulletin (December 1966) : 84-84. https://fraser.stlouisfed.org/title/62/item/21384/toc/329291 , accessed on June 26, 2024.