Federal Reserve Bank of Dallas. "New WATS Numbers, Circular No. 79-124," District Notices (Federal Reserve Bank of Dallas) (August 1, 1979). https://fraser.stlouisfed.org/title/5569/item/542715, accessed on May 3, 2024.
Federal Reserve Bank of Dallas. "New WATS Numbers, Circular No. 79-124," District Notices (Federal Reserve Bank of Dallas) (August 1, 1979). https://fraser.stlouisfed.org/title/5569/item/542715, accessed on May 3, 2024.