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. "May 1954," Federal Reserve Bulletin (May 1954) : 82-82. https://fraser.stlouisfed.org/title/62/item/21233/toc/49171 , accessed on March 28, 2024.