0000950134-99-001840 DEF 14A 1 19990427 19990322 BOK FINANCIAL CORP ET AL 0000875357 6021 731373454 OK 1231 DEF 14A 34 000-19341 99570079 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 000095013499001840-001-seq1-def-14a.txt DEFINITIVE PROXY STATEMENT