Federal Reserve Bank of Dallas. "Custody of Securities, Circular No. 77-83," District Notices (Federal Reserve Bank of Dallas) (August 2, 1977). https://fraser.stlouisfed.org/title/5569/item/542344, accessed on November 20, 2018.
Bulletin 7 Custody of Securities. to Be Amended, Effective 12-1-77. Improvements in Service of Joint Safekeeping of Pledged Securities for Member Banks and Political Subdivisions.