Federal Reserve Bank of Dallas. "Proposed Amendment, Circular No. 81-230," District Notices (Federal Reserve Bank of Dallas) (December 9, 1981). https://fraser.stlouisfed.org/scribd/?item_id=541413&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19811209_no81-230.pdf&start_page=1, accessed on September 21, 2017.
Regulations G, T, and U (Securities Credit) Federal Reserve Board Proposed Amendments to Criteria that OTC Stocks Must Meet P. R. 11-19-81. Comment by 1-29-82 on Docket No. R-0372.