Federal Reserve Bank of Dallas. "Interest Rates, Circular No. 81-93," District Notices (Federal Reserve Bank of Dallas) (May 6, 1981). https://fraser.stlouisfed.org/scribd/?item_id=541275&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19810506_no81-093.pdf&start_page=1, accessed on September 19, 2017.
Regulation Q Related. Current Interest Rate Ceilings by Recorded Telephone Message. Revised Every Monday for Money Market CDs; Treasury Bills and Federal Reserve Discount.