Federal Reserve District Boundaries, March 1998
Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Federal Reserve District Boundaries, March 1998," Description of Federal Reserve Districts (March 1998). https://fraser.stlouisfed.org/scribd/?item_id=23468&filepath=/files/docs/historical/federal reserve history/frdistricts/frb_districts_199803.pdf&start_page=1, accessed on September 24, 2017.
This 1998 version of the new title indicates that it is based on the 1990 census.