0000875357-01-000004 DEF 14A 1 20010424 20010329 BOK FINANCIAL CORP ET AL 0000875357 6021 731373454 OK 1231 DEF 14A 34 000-19341 1585093 BANK OF OKLAHOMA TOWER PO BOX 2300 TULSA OK 74192 9185886416 BANK OF OKLAHOMA TOWER P O BOX 2300 TULSA OK 74192 DEF 14A 1 0001.txt DEFINITIVE PROXY STATEMENT