Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Freight-Car Loadings, by Classes," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "July 1949," Federal Reserve Bulletin (July 1949) : 84-84. https://fraser.stlouisfed.org/title/62/item/21175/toc/359865 , accessed on March 29, 2024.