Federal Reserve Bank of Dallas. "[Third Amendment No. 530, Ninth Revision No. 300, Define Applicability of Regulations to U. S. Savings Notes], Circular No. 67-107,"
District Notices (Federal Reserve Bank of Dallas)
(May 26, 1967).
https://fraser.stlouisfed.org/title/5569/item/543548, accessed on March 2, 2025.
@FedFRASER