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. "June 1948," Federal Reserve Bulletin (June 1948) : 100-100. https://fraser.stlouisfed.org/title/62/item/21162/toc/137313 , accessed on November 30, 2023.