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.



- ------------------------------------------------------------ ----------------------------------------------------------------------

FOR THIS TYPE OF ACCOUNT: GIVE THE                           FOR THIS TYPE OF ACCOUNT:         GIVE THE
                          SOCIAL SECURITY                                                      SOCIAL SECURITY
                          NUMBER OF --                                                         NUMBER OF --
- ------------------------------------------------------------ ----------------------------------------------------------------------

                                                                                      
1.  An individual's       The individual                     9.   A valid trust, estate or     The legal entity (Do not furnish the
    account                                                       pension trust                identifying number of the personal
                                                                                               representative or trustee unless the
                                                                                               legal entity itself is not designated
                                                                                               in the account title.)  (5)

2.  Husband and wife      The actual owner of the account    10.  Corporate account            The corporation
    (joint account)       or, if combined funds, any one
                          of the individuals (1)

3.  Husband and wife      The actual owner of the account    11.  Religious, charitable, or    The organization
    (joint account)       or, if joint funds, either              educational organization
                          person (1)                              account

4.  Custodian account of  The minor (2)                      12.  Partnership account held in  The partnership
    a minor (Uniform                                              the name of the business
    Gift to Minors Act)

5.  Adult and minor       The adult or, if the minor is      13.  Association, club, or other  The organization
    (joint account)       the only contributor, the minor         tax-exempt organization
                          (1)

6.  Account in the name   The ward, minor, or incompetent    14.  A broker or registered       The broker or nominee
    of guardian or        person (3)                              nominee
    committee for a
    designated ward,
    minor, or
    incompetent person
- -----------------------------------------------------------------------------------------------------------------------------------


(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)   Circle the ward's, minor's or incompetent person's name and furnish such
      person's social security number. 
(4)   Show the name of the owner. 
(5)   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.



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

     OBTAINING A NUMBER. -- If you don't have a taxpayer identification number
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 (the "IRS") and apply for a number.

     PAYEES EXEMPT FROM BACKUP WITHHOLDING. -- Payees specifically exempted 
from backup withholding on ALL payments including the following:

     (1)  A corporation.

     (2)  A financial institution.

     (3)  An organization exempt from tax under section 501(a), or an
          individual retirement plan.

     (4)  The United States or any agency or instrumentality thereof.

     (5)  A State, the District of Columbia, a possession of the United
          States, or any subdivision or instrumentality thereof.

     (6)  A foreign government, a political subdivision of a foreign 
          government, or any agency or instrumentality thereof.

     (7)  An international organization or any agency, or instrumentality
          thereof.

     (8)  A registered dealer in securities or commodities registered in the 
          U.S. or a possession of the U.S.

     (9)  A real estate investment trust.

     (10) A common trust fund operated by a bank under section 584(a).

     (11) An exempt charitable remainder trust, or a non-exempt trust
          described in section 4947(a)(1).

     (12) An entity registered at all times under the Investment Company Act
          of 1940.

     (13) 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 non-resident 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 the 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 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, AND RETURN IT TO
THE PAYER, IF THE PAYMENTS ARE INTEREST, DIVIDENDS, OR PATRONAGE DIVIDENDS, ALSO
SIGN AND DATE THE FORM.

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 regulations under sections 6041, 6041A(a),
6045, 6050A.

     PRIVACY ACT NOTICE. -- Section 6109 requires most recipients of dividend,
interest, or other payments to give taxpayer identification numbers to payers
who must report the payments to the IRS. The IRS uses the numbers for
identification purposes. Payers must be given the numbers whether or not
recipients are required to file tax returns. Beginning January 1, 1984, payers
must generally withhold 20% 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 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)  FAILURE TO REPORT CERTAIN DIVIDEND AND INTEREST PAYMENTS. -- If you
fail to include any portion of an includible payment for interest, dividends, or
patronage dividends in gross income, such failure will be treated as being due
to negligence and will be subject to a penalty of 5% on any portion of an
under-payment attributable to that failure unless there is clear and convincing
evidence to the contrary.

     (3)  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.

     (4)  CRIMINAL PENALTY FOR FALSIFYING INFORMATION. -- 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