Federal Reserve Bank of Dallas. "Regulation G, T, and U, Circular No. 81-149," District Notices (Federal Reserve Bank of Dallas) (July 21, 1981). https://fraser.stlouisfed.org/title/5569/item/541331, accessed on August 14, 2018.
Federal Reserve Press Release 7-10-81, Invites Comments on 2nd Set of Proposed Amendments to Margin Regulations. Docket No. R-0362.