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

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CUSIP No.      ▇▇▇▇▇▇▇▇▇             13G                       Page 7 of 8 Pages



                          EXHIBIT 1 TO SCHEDULE 13G
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                                July 11, 1997
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           ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇▇, DISCOVER & CO. and ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ 

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

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

            ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ASSET MANAGEMENT INC.
                        
   BY:      /s/ ▇▇▇▇▇▇ ▇. ▇▇▇▇
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            ▇▇▇▇▇▇ ▇. ▇▇▇▇/ Vice President, ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ Asset
                            Management Inc.



            ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇▇, DISCOVER & CO.
            
   BY:      /s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇
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            ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ / ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ & Co., Incorporated