0000875357-00-000003 DEF 14A 1 20000425 20000322 BOK FINANCIAL CORP ET AL 0000875357 6021 731373454 OK 1231 DEF 14A 34 000-19341 575393 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 000087535700000003-001-seq1-def-14a.txt DEFINITIVE PROXY STATEMENT