Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Wholesale Prices, by Groups of Commodities," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1939," Federal Reserve Bulletin (May 1939) : 80-80. https://fraser.stlouisfed.org/title/62/item/21013/toc/249136 , accessed on April 26, 2024.