MORGAN STANLEY ASSET MANAGEMENT INC. BY: /s/ DONALD P. RYAN -------------------------------------------------------------------- Donald P. Ryan/ Vice President, Morgan Stanley Asset Management Inc.

   1
CUSIP No.      000000000             13G                       Page 7 of 8 Pages



                          EXHIBIT 1 TO SCHEDULE 13G
                      ----------------------------------


                                July 11, 1997
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           XXXXXX XXXXXXX, XXXX XXXXXX, DISCOVER & CO. and XXXXXX XXXXXXX 

         ASSET MANAGEMENT INC., hereby agree that, unless differentiated, 

         this Schedule 13G is filed on behalf of each of the parties.
         

            XXXXXX XXXXXXX ASSET MANAGEMENT INC.
                        
   BY:      /s/ XXXXXX X. XXXX
            --------------------------------------------------------------------
            Xxxxxx X. Xxxx/ Vice President, Xxxxxx Xxxxxxx Asset
                            Management Inc.



            XXXXXX XXXXXXX, XXXX XXXXXX, DISCOVER & CO.
            
   BY:      /s/ XXXXX XXXXXXXX
            --------------------------------------------------------------------
            Xxxxx Xxxxxxxx / Xxxxxx Xxxxxxx & Co., Incorporated