EXHIBIT 23.1


                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent public accountants, we hereby consent to the incorporation of our
report included in this Form 10-K into the Company's previously filed
Registration Statements on Form S-8 (File Nos. 333-80505, 333-10813 and
33-60926).


                                                       /s/  ARTHUR ANDERSEN LLP
Tulsa, Oklahoma
February 28, 2002