Federal Reserve Bank of Dallas. "Revised Supplement B to Bulletin 4, Circular No. 76-167," District Notices (Federal Reserve Bank of Dallas) (December 13, 1976). https://fraser.stlouisfed.org/scribd/?item_id=542250&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19761213_no76-167.pdf, accessed on November 18, 2017.
Bulletin 4, Revised Supplement B for 1911, Current Schedule of Base and Related Reserve Periods