Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Market Groupings, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "July 1960," Federal Reserve Bulletin (July 1960) : 71-71. https://fraser.stlouisfed.org/title/62/item/21307/toc/67268 , accessed on May 4, 2024.