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. "March 1956," Federal Reserve Bulletin (March 1956) : 50-50. https://fraser.stlouisfed.org/title/62/item/21255/toc/367605 , accessed on April 23, 2024.