EXHIBIT 23.01
 
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
    As independent public accountants, we hereby consent to the incorporation of
our reports included in this Form 10-K, into the Company's previously filed
Registration Statement File No. 33-93900, Registration Statement File No.
333-2592, Registration Statement File No. 333-2594, Registration Statement File
No. 333-09811, Registration Statement File No. 333-22473 and Registration
Statement File No. 333-24279
 
                                          ARTHUR ANDERSEN LLP
 
Omaha, Nebraska,
 
December 19, 1997