Board of Governors of the Federal Reserve System (U.S.), 1935-. "June 6, 1968," G.14 U.S. Government Security Yields and Prices (1968-06-06). https://fraser.stlouisfed.org/title/1259/item/48904, accessed on April 23, 2024.
Board of Governors of the Federal Reserve System (U.S.), 1935-. "June 6, 1968," G.14 U.S. Government Security Yields and Prices (1968-06-06). https://fraser.stlouisfed.org/title/1259/item/48904, accessed on April 23, 2024.