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                                                                EXHIBIT 99(c)

 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER 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.
 


- -----------------------------------------------------------
                                            GIVE THE
                                        SOCIAL SECURITY
     FOR THIS TYPE OF ACCOUNT:            NUMBER OF--
- -----------------------------------------------------------
                               
 1.  An individual's account.        The individual
 2.  Two or more individuals (joint  The actual owner of
     account)                        the account or, if
                                     combined funds, the
                                     first individual on
                                     the account(1)
 3.  Custodian account of a minor    The minor(2)
     (Uniform Gift to Minors Act)
 4.  a. The usual revocable savings  The grantor-trustee(1)
       trust account (grantor is
       also trustee)
     b. So-called trust account      The actual owner(1)
       that is not a legal or valid
       trust under state law
 5.  Sole proprietorship account     The owner(3)
 6.  A valid trust, estate or        Legal entity
     pension trust
                                     (Do not furnish the
                                     identifying number of
                                     the personal
                                     representative or
                                     trustee unless the
                                     legal entity itself is
                                     not designated in the
                                     account title)(4)
- -----------------------------------------------------------


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

 
(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.
 
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.
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            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
                                     PAGE 2
 
OBTAINING A NUMBER
If you don't 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 office
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 interest, dividends
and broker transactions payments include the following:
  - A corporation.
  - A financial institution.
  - An organization exempt from tax under section 501(a), or an individual
    retirement 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.
  - A foreign government, a political subdivision of a foreign government or any
    agency or instrumentality thereof.
  - An international organization or any agency or instrumentality thereof.
  - A registered dealer in securities or commodities registered in the U.S. or a
    possession of the U.S.
  - A real estate investment trust.
  - A common trust fund operated by a bank under section 584(a).
  - An exempt charitable remainder trust, or a non-exempt trust described in
    section 4947(a)(1).
  - An entity registered at all times under the Investment Company Act of 1940.
  - A foreign central bank of issue.
  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 U.S. and
    which have at least one nonresident partner.
  - Payments of patronage dividends where the amount received is 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 nonresident 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 FORM W-9 TO AVOID POSSIBLE ERRONEOUS
BACKUP WITHHOLDING. COMPLETE THIS SUBSTITUTE FORM W-9 AS FOLLOWS:
 
ENTER YOUR TAXPAYER IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE
FORM, SIGN, DATE AND RETURN THE FORM TO THE PAYER.
 
  Certain payments other than interest, dividends and patronage dividends, that
are not subject to information reporting are also not subject to backup
withholding. For details, see the sections 6041, 6041A(a), 6044, 6045, 6049,
6050A and 6050N and the regulations thereunder.
 
  PRIVACY ACT NOTICE.--Section 6109 requires most recipients of dividends,
interest or other payments to give taxpayer identification numbers to payers who
must report the payments to IRS. IRS uses the numbers for identification
purposes and to help verify the accuracy of tax returns. 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 which is due to reasonable
cause and not to willful neglect.
(2) CIVIL PENALTY FOR FALSE STATEMENTS 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
certifications 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.