Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Freight-Car Loadings, by Lines," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "June 1928," Federal Reserve Bulletin (June 1928) : 22-22. https://fraser.stlouisfed.org/title/62/item/20678/toc/184121 , accessed on April 26, 2024.