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

                                 GIVE THE TAXPAYER
                                 IDENTIFICATION
FOR THIS TYPE OF ACCOUNT:        NUMBER OF--
                           
- -----------------------------------------------------
7.         Corporate account     The corporation
8.         Religious,            The organization
           charitable, or
           educational
           organization account
9.         Partnership account   The partnership
10.        Association, club,    The organization
           or other tax-exempt
           organization
11.        A broker or           The broker or
           registered nominee    nominee
12.        Account with the      The public entity
           Department of
           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. If
    only one person on a joint account has an SSN, that person's number must be
    furnished.
 
(2) Circle the minor's name and furnish the minor's social security number.
 
(3) Show your individual name. You may also enter your business or "doing
    business as" name. You may use either your social security number or your
    employer identification number.
 
(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 listed, 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
                                     PAGE 2
 
Note: Section references are to the Internal Revenue Code unless otherwise
      noted.
 
OBTAINING A NUMBER
 
If you do not have a taxpayer identification number or you don't know your
number, obtain Form SS-5, Application for a Social Security Number Card (for
individuals), or Form SS-4, Application for Employer Identification Number (for
businesses and all other entities), at the local office of the Social Security
Administration or the Internal Revenue Service (the "IRS") and apply for a
number.
 
PAYEES AND PAYMENTS EXEMPT FROM BACKUP WITHHOLDING
 
The following is a list of payees exempt from backup withholding and for which
no information reporting is required. For interest and dividends, all listed
payees are exempt except item (9). For broker transactions, payees listed in
items (1) through (13) and a person registered under the Investment Advisors Act
of 1940 who regularly acts as a broker are exempt. Payments subject to reporting
under sections 6041 and 6041A are generally exempt from backup withholding only
if made to payees described in items (1) through (7), except a corporation
(other than certain hospitals described in Regulations section 1.6041-3(c)) that
provides medical and health care services or bills and collects payments for
such services is not exempt from backup withholding or information reporting.
Only payees described in items (1) through (5) are exempt from backup
withholding for barter exchange transactions and patronage dividends.
 
(1) An organization exempt from tax under section 501(a), or an IRA, or a
custodial account under section 403(b)(7), if the account satisfies the
requirements of section 401(f)(2).
 
(2) The United States or any of its agencies or instrumentalities.
 
(3) A state, the District of Columbia, a possession of the United States, or any
of their political subdivisions or instrumentalities.
 
(4) A foreign government or any of its political subdivisions, agencies or
instrumentalities.
 
(5) An international organization or any of its agencies or instrumentalities.
 
(6) A corporation.
 
(7) A foreign central bank of issue.
 
(8) A dealer in securities or commodities required to register in the United
States, the District of Columbia or a possession of the United States.
 
(9) A futures commission merchant registered with the Commodity Futures Trading
Commission.
 
(10) A real estate investment trust.
 
(11) An entity registered at all times during the tax year under the Investment
Company Act of 1940
 
(12) A common trust fund operated by a bank under section 584(a).
 
(13) A financial institution.
 
(14) A middleman known in the investment community as a nominee or listed in the
most recent publication of the American Society of Corporate Secretaries, Inc.,
Nominee List.
 
(15) A trust exempt from tax under section 664 or described in section 4947.
 
Payments of dividends and patronage dividends that generally are exempt from
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 alien partner.
 
- - Payments of patronage dividends not paid in money.
 
- - Payments made by certain foreign organizations.
 
- - Section 404(k) payments made by an ESOP.
 
Payments of interest that generally are exempt from 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 payor.
 
- - 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 of mortgage interest to you.
 
Exempt payees described above should file substitute Form W-9 to avoid possible
erroneous backup withholding. FILE THIS FORM WITH THE PAYER, FURNISH YOUR
TAXPAYER IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, SIGN AND
DATE THE FORM AND RETURN IT TO THE PAYER. IF YOU ARE A NON-RESIDENT ALIEN OR A
FOREIGN ENTITY NOT SUBJECT TO BACKUP WITHHOLDING, FILE WITH PAYER A COMPLETED
INTERNAL REVENUE FORM W-8 (CERTIFICATE OF FOREIGN STATUS).
 
    Payments that are not subject to information reporting are also not subject
to backup withholding. For details, see sections 6041, 6041A, 6042, 6044, 6045,
6049, 6050A and 6050N and the regulations promulgated thereunder.
 
PRIVACY ACT NOTICE.--Section 6109 requires most recipients of dividend,
interest, or other payments to give taxpayer identification numbers to payors
who must report the payments to the IRS. The IRS uses the numbers for
identification purposes. 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 requester, 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
certifications or affirmations may subject you to criminal penalties including
fines and/or imprisonment.
 
FOR ADDITIONAL INFORMATION CONTACT YOUR TAX CONSULTANT OR THE INTERNAL REVENUE
SERVICE.