Federal Reserve Bank of Dallas. "New Bulletin 11, Circular No. 81-155," District Notices (Federal Reserve Bank of Dallas) (July 30, 1981). https://fraser.stlouisfed.org/title/5569/item/541337, accessed on October 20, 2018.
Automated Clearing House Operations Effective 8-1-81. ACH Service Available to All Depository Institutions. Includes Time and Fee Schedules as Appendices a and B.