0000950131-99-000662 8-K 4 19990208 5 7 19990208 ONEOK INC /NEW/ 0001039684 4923 731520922 OK 1231 8-K 34 001-13643 99524255 100 WEST 5TH ST TULSA OK 74103 9185887000 100 WEST 5TH ST TULSA OK 74103 WAI INC 19970519 8-K 1 000095013199000662-001-seq1-8-k.txt FORM 8-K EX-1.A 2 000095013199000662-002-seq2-ex-1-a.txt UNDERWRITING AGREEMENT EX-1.B 3 000095013199000662-003-seq3-ex-1-b.txt PRICE DETERMINATION AGREEMENT EX-4 4 000095013199000662-004-seq4-ex-4.txt THIRD SUPPLEMENTAL INDENTURE