EXHIBIT 23.1
 
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
  As independent public accountants, we hereby consent to the use of our report
(and to all references to our Firm) included in or made a part of this
registration statement on Form S-4 (File No. 333-57201).
 
/s/ ARTHUR ANDERSEN LLP
 
Minneapolis, Minnesota
   
September 21, 1998