Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Revenues, Expenses, and Income of Class I Railroads," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "July 1948," Federal Reserve Bulletin (July 1948) : 103-103. https://fraser.stlouisfed.org/title/62/item/21163/toc/351533 , accessed on September 26, 2023.