EXHIBIT 99.(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
For this type of account:    SOCIAL SECURITY
                             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, any one
                             of the
                             individuals(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    or incompetent
    for a designated ward,   person(3)
    minor, or 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
 For this type of account:   IDENTIFICATION
                             number of--
- ---------------------------------------------
                          
 9. A valid trust, estate,   Legal entity (Do
    or pension trust         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,   The organization
    or educational
    organization account
12. Partnership account      The partnership
    held 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
    Department of            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)  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
                                    Page 2
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 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 re-
   tirement 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 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 with-
holding. For details, see the regulations under 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 IRS. 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, 1993, 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) 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