Board of Governors of the Federal Reserve System (U.S.), 1935-. "Approval of applications of First Interstate BancSystem of Montana, Inc., to acquire First Interstate Bank of South Missoula, N.A., and a subsidiary of FIBM, First Interstate Bank of Commerce to become a member of the Federal Reserve System" in Press Releases of the Board of Governors of the Federal Reserve System
(October 26, 1992).
https://fraser.stlouisfed.org/title/9237/item/692481, accessed on January 24, 2026.