United States. Department of the Treasury. "Procedures for exchange of E, F and J savings bonds, January 15, 1960," in United States. Department of the Treasury. "Volume 120," Press Releases of the United States Department of the Treasury (January 5, 1960 - March 31, 1960) : 30-38. https://fraser.stlouisfed.org/title/6111/item/586963/toc/538103 , accessed on June 24, 2024.