EXHIBIT (a)(1)(F)

            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    The actual owner
 (joint account)              of the account
                              or, if combined
                              funds, the first
                              individual on the
                              account(1)
3. Husband and wife (joint    The actual owner
 account)                     of the account
                              or, if joint
                              funds, either
                              person(1)
4. Custodian account of a     The minor(2)
 minor (Uniform Gift to
 Minors Act)
5. Adult and minor (joint     The adult or, if
 account)                     the minor is the
                              only contributor,
                              the minor(1)
6. Account in the name of     The ward, minor,
 guardian or committee for a  or incompetent
 designated ward, minor, or   person(3)
 incompetent person
7. a. The usual revocable     The grantor-
      savings trust account   trustee(1)
      (grantor is also
      trustee)
b. So-called trust account    The actual
   that is not a legal or     owner(1)
   valid trust under State
   law
8. Sole proprietorship        The owner(4)
 account
- -----------------------------------------------


                                        --------

                               Give the EMPLOYER
                               IDENTIFICATION
For this type of account:      number of:
                                        --------
                            
 9. A valid trust, estate, or  The 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)(5)
10. Corporate account          The corporation
11. Religious, charitable, or  The organization
  educational organization
  account
12. Partnership account held   The partnership
  in the name of the business
13. Association, club, or      The organization
  other tax-exempt
  organization
14. A broker or registered     The broker or
  nominee                      nominee
15. 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 a Social Security number, that
    person's number must be furnished.
(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) You must show your individual name, but you may also enter your business
    or "doing business as" name. You may use either your Social Security
    Number or Employer Identification Number (if you have one).
(5) 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.

                                  (a)(1)(F)-1


            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
                                    Page 2

Obtaining a Number

If you don't have a TIN or you don't know your number, obtain Internal Revenue
Service Form SS-5, Application for Social Security Number Card or Form SS-4,
Application for Employer Identification Number at your 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 payments include
the following:

  . A corporation.

  . A financial institution.

  . An organization exempt from tax under Section 501(A) or an individual
    retirement plan.

  . 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 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
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 Sections 6041, 6041A(a), 6045, and 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. 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 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.--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

                                  (a)(1)(F)-2