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. "September 1964," Federal Reserve Bulletin (September 1964) : 84-84. https://fraser.stlouisfed.org/title/62/item/21357/toc/350757 , accessed on March 29, 2024.