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/ Xxxxx X. Xxxxxxxxxx
_______________________
Xxxxx X. Xxxxxxxxxx
Authorized Signatory
Xxxxxx Xxx
By: /s/ Xxxxx X. Xxxxxxxxxx
_______________________
Xxxxx X. Xxxxxxxxxx
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