0000875357-09-000017 10-Q 4 20090331 20090430 20090429 BOK FINANCIAL CORP ET AL 0000875357 6021 731373454 OK 1231 10-Q 34 000-19341 09780381 BANK OF OKLAHOMA TOWER PO BOX 2300 TULSA OK 74192 9185953025 BANK OF OKLAHOMA TOWER P O BOX 2300 TULSA OK 74192 10-Q 1 quarterly033109.txt FORM 10-Q 033109 EX-31 2 exhibit311.txt EXHIBIT 31.1 CEO CERTIFICATION EX-31 3 exhibit312.txt EXHIBIT 31.2 CFO CERTIFICATION EX-32 4 exhibit32.txt CEO CFO CERTIFICATIONS