Federal Reserve Bank of Dallas. "Change in Reserve Requirements Against Demand Deposits, Circular No. 69-81," District Notices (Federal Reserve Bank of Dallas) (April 4, 1969). https://fraser.stlouisfed.org/scribd/?item_id=544074&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19690404_no69-081.pdf&start_page=1, accessed on October 24, 2017.
Change in Reserve Requirements Against Demand Deposits Revised Supplement to Regulation D, Effective 4-17-69