EXHIBIT (a)(6)

            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9

   GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER FOR THE PAYEE
(YOU) TO GIVE THE PAYER--Social Security numbers have nine digits separated by
two hyphens: i.e. 000-00-0000. Employer identification numbers have nine
digits separated by only one hyphen: i.e. 00-0000000. The table below will
help determine the number to give the payer.

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                                                                GIVE THE
FOR THIS TYPE OF ACCOUNT:                                       SOCIAL SECURITY
                                                                NUMBER OF --
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 1.  An individual's account                                    The individual
 2.  Two or more individuals (joint account)                    The actual owner
                                                                of the account
                                                                or, if combined
                                                                funds, the first
                                                                individual on
                                                                the account(1)
 3.  Custodian account of a minor (Uniform Gift to Minors Act)  The minor(2)
 4.  a.  The usual revocable savings trust (grantor is also     The grantor-
         trustee)                                               trustee(1)
     b.  So-called trust account that is not a legal or valid   The actual
         trust under State  law                                 owner(1)
 5.  Sole proprietorship account                                The owner(3)


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                                                              GIVE THE EMPLOYER
FOR THIS TYPE OF ACCOUNT:                                     IDENTIFICATION
                                                              NUMBER OF --
- ------------------------------------------------------------------------------
                                                           
 6.  A valid trust, estate,                                   The legal
     or pension trust                                         entity(4)
 7.  Corporate account                                        The corporation
 8.  Partnership account held in the name of the business     The partnership
 9.  Association, club, or other tax-exempt organization      The organization
     account
10.  A broker or registered nominee                           The broker or
                                                              nominee
11.  Account with the Department of Agriculture in the name   The public
     of a public entity (such as a State or local government, entity
     school district, or prison) that receives agriculture
     program payments


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  (1) List first and circle the name of the person whose number you furnish.
  (2) Circle the minor's name and furnish the minor's social security number.
  (3) Show the name of the owner. The name of the business or the "doing
      business as" name may also be entered. Either the social security number
      or the employer identification number may be used.
  (4) List first and circle the name of the legal trust, estate, or pension
      trust. (Do not furnish the taxpayer identification number of the personal
      representative or trustee unless the legal entity itself is not
      designated in the account title.)


NOTE: If no name is circled when there is more than one name, the number will
      be considered to be that of the first name listed.


            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
OBTAINING A NUMBER
If you do not have a taxpayer identification number ("TIN") or you don't know
your number, obtain Form SS-5, Application for a Social Security Number Card
or Form SS-4, Application for Employer Identification Number, at the local of-
fice of the Social Security Administration or the Internal Revenue Service and
apply for a number.

PAYEES EXEMPT FROM BACKUP WITHHOLDING
Payees specifically exempted from backup withholding on all dividend and in-
terest payments and on broker transactions include the following:
 . A corporation.
 . A financial institution.
 . An organization exempt from tax under section 501(a), or an individual re-
   tirement plan, or a custodial account under Section 403(b)(7).
 . The United States or any agency or instrumentality thereof.
 . A State, the District of Columbia, a possession of the United States, or
   any subdivision or instrumentality thereof.
 . An international organization or any agency or instrumentality thereof.
 . A foreign government, a political subdivision of a foreign government, or
   any agency or instrumentality thereof.
 . A registered dealer in securities or commodities registered in the United
   States or a possession of the United States.
 . A real estate investment trust.
 . A common trust fund operated by a bank under Section 584(a).
 . An entity registered at all times during the tax year under the Investment
   Company Act of 1940.
 . A foreign central bank of issue.
 . An exempt charitable remainder trust, or a non-exempt trust described in
   section 6967(a)(1).
 Payments of dividends and patronage dividends not generally subject to backup
withholding include the following:
 . Payments to nonresident aliens subject to withholding under Section 1441.
 . Payments to partnerships not engaged in a trade or business in the United
   States and which have at least one nonresident partner.
 . Payments of patronage dividends where the amounts received are not paid in
   money.
 . Payments made by certain foreign organizations.
 . Payments made to a nominee.
 Payments of interest not generally subject to backup withholding include the
following:
 . Payments of interest on obligations issued by individuals. Note: You may be
   subject to backup withholding if this interest is $600 or more and is paid
   in the course of the payer's trade or business and you have not provided
   your correct taxpayer identification number to the payer.
 . Payments of tax-exempt interest (including exempt-interest dividends under
   Section 852).
 . Payments described in section 6049(b)(5) to non-resident aliens.
 . Payments on tax-free covenant bonds under section 1451.
 . Payments made by certain foreign organizations.
 . Payments made to a nominee.
Exempt payees described above should file the substitute Form W-9 to avoid
possible erroneous backup witholding. Complete the substitute Form W-9 as fol-
lows:
ENTER YOUR TAXPAYER IDENTIFICATION NUMBER, WRITE "EXEMPT" ACROSS THE FACE OF
THE FORM, AND RETURN THE FORM TO THE PAYER.
 Certain payments, other than payments of interest, dividends, and patronage
dividends, that are subject to information reporting are also not subject to
backup withholding. For details, see sections 6041, 6041A(a), 6042, 6044,
6045, 6050A and 6050N and the regulations thereunder.
PRIVACY ACT NOTICE.--Section 6109 requires you to provide your correct tax-
payer identification number to payers, who must report the payments to the
IRS. The IRS uses the number for identification purposes and may also provide
this information to various government agencies for tax enforcement or litiga-
tion purposes. Payers must be given the numbers whether or not recipients are
required to file tax returns. Payers must generally withhold 31% of taxable
interest, dividend, and certain other payments to a payee who does not furnish
a taxpayer identification number to a payer. Certain penalties may also apply.

PENALTIES
(1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER--If you fail
to furnish your correct taxpayer identification number to a payer, you are
subject to a penalty of $50 for each such failure unless your failure is due
to reasonable cause and not to willful neglect.
(2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING--If you
make a false statement with no reasonable basis which results in no imposition
of backup withholding, you are subject to a penalty of $500.
(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION--Willfully falsifying certifi-
cations or affirmations may subject you to criminal penalties including fines
and/or imprisonment.
(4) MISUSE OF TAXPAYER IDENTIFICATION NUMBERS--If the payer discloses or uses
taxpayer identification numbers in violation of Federal law, the payer may be
subject to civil and criminal penalties.
FOR ADDITIONAL INFORMATION CONTACT YOUR TAX CONSULTANT OR THE INTERNAL REVENUE
SERVICE