<PAGE>
 
                                   SIGNATURE
                                   ---------

         After reasonable inquiry and to the best of our knowledge and belief,
we certify that the information set forth in this statement is true, complete
and correct.


                                       BankAmerica Corporation


Dated:  February 9, 1995               By /s/JAMES H. WILLIAMS
                                          --------------------- 
                                          James H. Williams
                                          Executive Vice President



                                       Bank of America NT&SA


Dated:  February 9, 1995               By /s/JAMES H. WILLIAMS
                                          --------------------- 
                                          James H. Williams
                                          Group Executive 
                                          Vice President


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