Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Market Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "June 1964," Federal Reserve Bulletin (June 1964) : 102-102. https://fraser.stlouisfed.org/title/62/item/21354/toc/39113 , accessed on April 23, 2024.