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/title/5569/item/541275, accessed on March 28, 2020.
Regulation Q Related. Current Interest Rate Ceilings by Recorded Telephone Message. Revised Every Monday for Money Market CDs; Treasury Bills and Federal Reserve Discount.