Federal Reserve Bank of Dallas. "Pricing and Access to Federal Reserve Services, Circular No. 81-15," District Notices (Federal Reserve Bank of Dallas) (January 19, 1981). https://fraser.stlouisfed.org/scribd/?item_id=541196&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19810119_no81-015.pdf&start_page=1, accessed on September 19, 2017.
Press Release 12-31-80, Announced Fees, Dates for Pricing and Access, and Principles Underlying Charges.