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. "September 1964," Federal Reserve Bulletin (September 1964) : 86-86. https://fraser.stlouisfed.org/title/62/item/21357/toc/350759 , accessed on May 5, 2024.