1 EXHIBIT 23 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report included in this Form 10-K, into the Company's previously filed Form S-8 Registration Statements File No. 333-01789, File No. 333-20673, and File No. 33-87782. ARTHUR ANDERSEN LLP Dallas, Texas, September 12, 1997