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. "December 1950," Federal Reserve Bulletin (December 1950) : 105-105. https://fraser.stlouisfed.org/title/62/item/21192/toc/219609 , accessed on March 19, 2024.