Federal Reserve Bank of Dallas. "Real Estate Credit, Amendment No. 4 to Regulation X," District Notices (Federal Reserve Bank of Dallas) (April 16, 1951). https://fraser.stlouisfed.org/scribd/?item_id=550043&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19510416b.pdf&start_page=1, accessed on October 22, 2017.
Restriction of Business Capital Expenditure Financing Bulletin No. 2 of Voluntary Credit Restraint Committee, Effective April 16, 1951