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. "April 1972," Federal Reserve Bulletin (April 1972) : 148-148. https://fraser.stlouisfed.org/title/62/item/21448/toc/358332 , accessed on March 29, 2024.