Exhibit 24(d) 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 Nos. 33-93006, 33-68648, 33- 68646, 33-60549 and 33-86616. ARTHUR ANDERSEN LLP Minneapolis, Minnesota, June 25, 1996