Federal Reserve Bank of Dallas. "Revised List of OTC Margin Stocks, Circular No. 77-7," District Notices (Federal Reserve Bank of Dallas) (January 7, 1977). https://fraser.stlouisfed.org/scribd/?item_id=542268&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19770107_no77-007.pdf&start_page=1, accessed on October 23, 2017.
OTC Margin Stocks, Revised List, Effective 12-30-76, Pursuant to Provisions of Regulations G, T, U, and X