
                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS




As independent public accountants, we hereby consent to the incorporation of our
reports  included  in this  Form  8-K/A,  into the  Company's  previously  filed
Registration Statements File No's. 33-79942, 333-03865, 33-66980, 33-86230 and
333-01874.


                                             ARTHUR ANDERSEN LLP


Phoenix, Arizona,
   January 9, 1997.
