Federal Reserve Bank of Dallas. "Changes in Time Schedule for Cash Items, Circular No. 68-132," District Notices (Federal Reserve Bank of Dallas) (August 27, 1968). https://fraser.stlouisfed.org/scribd/?item_id=543893&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19680827_no68-132.pdf&start_page=1, accessed on October 22, 2017.
Changes in Time Schedule for Cash Items. Amended Page 3, of Bulletin No. 8a. Effective 9-1-68.