0000950131-99-005020 8-K 4 19990817 5 7 19990817 ONEOK INC /NEW/ 0001039684 4923 731520922 OK 0831 8-K 34 001-13643 99694609 100 WEST 5TH ST TULSA OK 74103 9185887000 100 WEST 5TH ST TULSA OK 74103 WAI INC 19970519 8-K 1 000095013199005020-001-seq1-8-k.txt FORM 8-K EX-1.(A) 2 000095013199005020-002-seq2-ex-1-a.txt UNDERWRITING AGREEMENT EX-1.(B) 3 000095013199005020-003-seq3-ex-1-b.txt PRICE DETERMINATION AGREEMENT EX-4 4 000095013199005020-004-seq4-ex-4.txt FIFTH SUPPLEMENTAL AGREEMENT