Board of Governors of the Federal Reserve System (U.S.), 1935-. "Approval of applications of Banc One Corporation and Banc One Ohio Corporation to acquire four subsidiaries of PNC Financial Corp" in Press Releases of the Board of Governors of the Federal Reserve System
(July 22, 1991).
https://fraser.stlouisfed.org/title/9237/item/692155, accessed on January 14, 2026.