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 1938," Federal Reserve Bulletin (May 1938) : 65-65. https://fraser.stlouisfed.org/title/62/item/21001/toc/276716 , accessed on March 28, 2024.