Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Price Movements in Principal Countries, Wholesale Prices, All Commodities," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1928," Federal Reserve Bulletin (May 1928) : 49-49. https://fraser.stlouisfed.org/title/62/item/20677/toc/187571 , accessed on April 24, 2024.