
                               ARTHUR ANDERSEN LLP 


                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent public accountants, we hereby consent to the incorporation of our
reports  included (or  incorporated  by reference)  in this Form 10-K,  into the
Company's previously filed Registration Statement File Nos. 33-79942, 333-03865,
33-66980, 33-86230, 333-01874.

                                             Arthur Andersen LLP

Phoenix, Arizona
 December 30, 1996
