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                                                                  EXHIBIT 99

                                 UNDERTAKINGS

        For the purposes of complying with the amendments to the rules
governing Form S-8 (effective July 13, 1990) under the Securities Act of 1933
(the "Securities Act"), the Registrant hereby undertakes as follows, which
undertaking shall be incorporated by reference into Registrant's Statement on
Form S-8 No. 2-90922 (filed May 2, 1990):

        Insofar as indemnification for liabilities arising under the Securities 
        Act may be permitted to directors, officers and controlling persons of 
        the Registrant, the Registrant has been advised that in the opinion of 
        the Securities and Exchange Commission such indemnification is against 
        public policy as expressed in the Securities Act and is, therefore, 
        unenforceable. In the event that a claim for indemnification against 
        such liabilities (other than the payment by the Registrant of 
        expenses incurred or paid by a director, officer or controlling person 
        of the Registrant in the successful defense of any action, suit or 
        proceeding) is asserted by such director, officer or controlling 
        person in connection with the securities being registered, the
        Registrant will, unless in the opinion of its counsel the matter has
        been settled by controlling precedent, submit to a court of appropriate
        jurisdiction the question whether such indemnification by it is against
        public policy as expressed in the Securities Act and will be governed
        by the final adjudication of such issue.