Federal Reserve Bank of Dallas. "Proposed Amendment of Treasury Department Circular No. 300 Providing for Book-Entry Treasury Securities, Circular No. 67-168,"
District Notices (Federal Reserve Bank of Dallas)
(August 23, 1967).
https://fraser.stlouisfed.org/title/5569/item/543610, accessed on March 2, 2025.
@FedFRASER