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. "March 1967," Federal Reserve Bulletin (March 1967) : 106-106. https://fraser.stlouisfed.org/title/62/item/21387/toc/347075 , accessed on May 4, 2024.