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/A Amendment No. 1, into the Company's
previously  filed  Registration Statements File No. 33-61697, File No. 33-63199,
File No. 33-80660 and File No. 33-84502.



                                        /s/ ARTHUR ANDERSEN LLP
                                        ----------------------    
                                            ARTHUR ANDERSEN LLP

   
Albuquerque, New Mexico
September 23, 1997