Federal Reserve Bank of Dallas. "Revised List of OTC Margin Stocks, Circular No. 81-199," District Notices (Federal Reserve Bank of Dallas) (October 21, 1981). https://fraser.stlouisfed.org/scribd/?item_id=541381&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19811021_no81-199.pdf&start_page=1, accessed on October 22, 2017.
Published by Federal Reserve Board 10-2-81, Pursuant to Provisions of Regulations G, T, and U