Federal Reserve Bank of Dallas. "Change in Postal Regulations," District Notices (Federal Reserve Bank of Dallas) (June 28, 1962). https://fraser.stlouisfed.org/title/5569/item/551610, accessed on April 19, 2024.
Federal Reserve Bank of Dallas. "Change in Postal Regulations," District Notices (Federal Reserve Bank of Dallas) (June 28, 1962). https://fraser.stlouisfed.org/title/5569/item/551610, accessed on April 19, 2024.