EXHIBIT B
JOINT FILING AGREEMENT
The undersigned acknowledge and agree that the foregoing
statement on Schedule 13G is filed on behalf of each of the undersigned and
that all subsequent amendments to this statement on Schedule 13G shall be
filed on behalf of each of the undersigned without the necessity of filing
additional joint acquisition statements. The undersigned acknowledge that
each shall be responsible for the timely filing of such amendments, and for
the completeness and accuracy of the information concerning him or it
contained therein, but shall not be responsible for the completeness and
accuracy of the information concerning the other, except to the extent that
he or it knows or has reason to believe that such information is accurate.
Dated: February 12, 1997
The TCW Group, Inc.
By: /s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇▇
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Authorized Signatory
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By: /s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇▇
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Authorized Signatory
Under Power of Attorney dated
January 30, 1996, on File with
Schedule 13G Amendment Number
1 for Matrix Service Co. dated
January 30, 1996.
B-1
