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                                                                    EXHIBIT 23.1
 
              CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS
 
     We consent to the use of our reports on the financial statements and
related financial statement schedule as of January 31, 1995 and 1996 and for
each of the years in the three year period ended January 31, 1996, dated
February 23, 1996, included herein, in this Registration Statement on Form S-1
and to the reference to our Firm under the heading "Experts."
 
/s/  HEIN + ASSOCIATES LLP
 
HEIN + ASSOCIATES LLP
Certified Public Accountants
Houston, Texas
   
March 5, 1997