Federal Reserve Bank of Dallas. "Federal Reserve Services Brochures, Circular No. 81-198," District Notices (Federal Reserve Bank of Dallas) (October 20, 1981). https://fraser.stlouisfed.org/scribd/?item_id=541380&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19811020_no81-198.pdf&start_page=1, accessed on September 26, 2017.
Pricing and Billing, Loan, Wire Transfer of Funds, Net Settlement, Checks, ACH and 1981 Telephone Directory