Federal Reserve Bank of Dallas. "[U.S. Savings Bonds, Series E and H Supplement and Amendment to Treasury Department Circulars Numbers 653 and 905], Circular No. 69-30,"
District Notices (Federal Reserve Bank of Dallas)
(February 17, 1969).
https://fraser.stlouisfed.org/title/5569/item/544031, accessed on March 2, 2025.