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. "March 1940," Federal Reserve Bulletin (March 1940) : 64-64. https://fraser.stlouisfed.org/title/62/item/21023/toc/383801 , accessed on May 10, 2024.