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. "September 1932," Federal Reserve Bulletin (September 1932) : 23-23. https://fraser.stlouisfed.org/title/62/item/20729/toc/79004 , accessed on March 28, 2024.