Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Bond and Stock Yields," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "July 1968," Federal Reserve Bulletin (July 1968) : 156-156. https://fraser.stlouisfed.org/title/62/item/21403/toc/143987 , accessed on April 23, 2024.