0000875357-08-000036 10-Q 4 20080630 20080808 20080808 BOK FINANCIAL CORP ET AL 0000875357 6021 731373454 OK 1231 10-Q 34 000-19341 081003226 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 quarterly063008.txt FORM 10-Q 06/30/08 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 EXHIBIT 32 SECTION 1350 CERTIFICATIONS