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. "March 1936," Federal Reserve Bulletin (March 1936) : 33-33. https://fraser.stlouisfed.org/title/62/item/20628/toc/61216 , accessed on April 26, 2024.