Federal Reserve Bank of Dallas. "Booklet on Security and Control of Funds Transfers, Circular No. 81-73," District Notices (Federal Reserve Bank of Dallas) (April 13, 1981). https://fraser.stlouisfed.org/title/5569/item/541255, accessed on November 15, 2018.
Bulletin 6 Related. Written for Auditors by the Auditing Department of Federal Reserve Bank Dallas.