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, into the Company's previously filed Registration Statements File #33-61697, File #33-63199, File #33-80660 and File #33-84502. /s/ ARTHUR ANDERSEN LLP ARTHUR ANDERSEN LLP Albuquerque, New Mexico August 12, 1996