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. "September 1951," Federal Reserve Bulletin (September 1951) : 132-132. https://fraser.stlouisfed.org/title/62/item/21201/toc/145910 , accessed on April 25, 2024.