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                                                                    EXHIBIT 23.1
 
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
     As independent public accountants, we hereby consent to the incorporation
of our report dated March 22, 1999 included in this Annual Report on Form 10-K,
into the Company's previously filed registration statements on Form S-8 (File
No. 333-61953).
 
ARTHUR ANDERSEN LLP
 
Houston, Texas
March 31, 1999