Board of Governors of the Federal Reserve System (U.S.), 1935-. "Special routing numbers issued to thrift institutions for participation in the Systems check clearance and automated clearing house facilities" in Press Releases of the Board of Governors of the Federal Reserve System
(February 14, 1974).
https://fraser.stlouisfed.org/title/9237/item/699523, accessed on August 10, 2026.