0000875357-98-000004 DEF 14A 1 19971231 19980323 NASD BOK FINANCIAL CORP ET AL 0000875357 6021 731373454 OK 1231 DEF 14A 34 000-19341 98570954 BANK OF OKLAHOMA TOWER PO BOX 2300 TULSA OK 74192 9185886000 BANK OF OKLAHOMA TOWER P O BOX 2300 TULSA OK 74192 DEF 14A 1 000087535798000004-001-seq1-def-14a.txt PROXY STATEMENT FOR ANNUAL MEETING OF SHAREHOLDERS