Federal Reserve Bank of Dallas. "Noncash Services, Circular No. 81-25," District Notices (Federal Reserve Bank of Dallas) (January 30, 1981). https://fraser.stlouisfed.org/scribd/?item_id=541206&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19810130_no81-025.pdf&start_page=1, accessed on October 16, 2017.
Bulletin 7 and Bulletin 9 Related. Noncash Services for Collection of Municipal and Corporate Coupons Discontinues 3-1-81 Unless Auto Charge Agreement Executed.