Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industry and Summary Market Groupings, Without Seasonal Adjustment," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "March 1960," Federal Reserve Bulletin (March 1960) : 60-60. https://fraser.stlouisfed.org/title/62/item/21303/toc/162918 , accessed on June 3, 2024.