<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                   Bank of America NT&SA

By /s/ CHERYL A. SOROKIN                 By    /s/ JUDITH A. BOYLE
   ----------------------------              -----------------------------
       Cheryl A. Sorokin                           Judith A. Boyle

Title  Executive Vice President           Title    Counsel
       and Secretary                            --------------------------
       ------------------------

Dated:  February 11, 1994                 Dated:  February 11, 1994
                 --                                        --

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