Exhibit 23.1

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation of our
reports  dated June 16,  2000,  included in this Form 11-K,  into the  Company's
previously filed Registration Statement File No. 333-27701.

                                                          /s/ARTHUR ANDERSEN LLP

San Antonio, Texas
June 22, 2000