Federal Reserve Bank of Dallas. "[Revised Bulletins 8, 10, 11;also Supplements A, B, C of Bulletin 13, Effective 7-1-74], Circular No. 74-158," District Notices (Federal Reserve Bank of Dallas) (June 17, 1974). https://fraser.stlouisfed.org/title/5569/item/544478, accessed on January 31, 2025.