Exhibit 2(b)

               SUPPLEMENTAL AGREEMENT TO STOCK PURCHASE AGREEMENT

     THIS SUPPLEMENTAL AGREEMENT TO STOCK PURCHASE AGREEMENT, dated as of
December 31, 2002 (this "Supplemental Agreement"), is made and entered into by
and between Sprint Corporation, a Kansas corporation ("Sprint"), Centel
Directories LLC, a Delaware limited liability company ("Centel LLC") ( Sprint
and Centel LLC are collectively referred to in this Supplemental Agreement as
"Sellers"), and R.H. Donnelley Corporation, a Delaware corporation ("Buyer").

                                    RECITALS

     A. Sprint, Centel LLC and Buyer entered into a Stock Purchase Agreement,
dated September 21, 2002 (the "Stock Purchase Agreement"), under which (i)
Sprint will sell to Buyer all of the issued and outstanding shares of capital
stock of DirectoriesAmerica, Inc., a Kansas corporation, which owns all of the
issued and outstanding shares of capital stock of Sprint Publishing &
Advertising, Inc., a Kansas corporation, and (ii) Centel LLC will sell to Buyer
all of the issued and outstanding shares of capital stock of Centel Directory
Company, a Delaware corporation, which owns a membership interest in CenDon,
L.L.C., a Delaware limited liability company.

     B. Sprint, Centel LLC and Buyer desire to supplement and amend certain
obligations of the Parties in connection with the transactions contemplated by
the Stock Purchase Agreement pursuant to this Supplemental Agreement.
Capitalized terms set forth in this Supplemental Agreement but not defined in
this Supplemental Agreement have the meanings ascribed to the terms in the Stock
Purchase Agreement.

          NOW, THEREFORE, in consideration of the foregoing and the respective
representations, warranties, covenants, agreements and conditions set forth in
this Supplemental Agreement, and intending to be legally bound by this
Supplemental Agreement, the Parties agree as follows:

     1. Post-Closing Purchase Price Adjustment and Closing. Sections 1.2, 1.3,
1.4 and 1.5 of the Stock Purchase Agreement are hereby replaced in their
entirety by the revised Sections 1.2, 1.3, 1.4 and 1.5 below. Schedule 1.3 of
the Stock Purchase Agreement is hereby replaced by the revised Schedule 1.3
attached hereto as Exhibit A. However, if the Closing does not occur on or
before 5 p.m. New York City time, on January 3, 2003, this Section 1 of this
Supplemental Agreement shall be of no effect whatsoever and the original
Sections 1.2, 1.3, 1.4 and 1.5 of the Stock Purchase Agreement and the original
Schedule 1.3 of the Stock Purchase Agreement shall remain in effect.



     "Section 1.2   Payment of Purchase Price.

     (a) In consideration for the sale, transfer and delivery of the Shares, at
the Closing Buyer shall deliver or cause to be delivered to Sellers (or to such
third parties as may be designated in writing by Sellers) the Estimated Purchase
Price in accordance with Section 1.2(d). The "Estimated Purchase Price" payable
at Closing shall equal (i) Two Billion Two Hundred Thirty Million Dollars
($2,230,000,000) minus (ii) Sixteen Million Five Hundred Twenty Five Thousand
Dollars ($16,525,000), which is the excess of the Target Working Capital over
the Estimated Working Capital (as such terms are defined below).

     (b) Sellers  have  delivered to Buyer an  estimated  combined  consolidated
balance sheet of the Companies as of the close of business on December 31, 2002,
prepared in accordance with the Accounting  Principles (as hereinafter  defined)
and a  certificate  setting forth the  Estimated  Working  Capital based on such
balance sheet. For the purposes of this Agreement,  "Estimated  Working Capital"
equals  $243,023,000,  which represents the good faith, best estimate of Sellers
of the book  value of the  Current  Assets (as  defined  in Section  1.3) of the
Companies less the book value of the Current  Liabilities (as defined in Section
1.3) of the  Companies  as of the close of  business on December  31,  2002,  as
reflected on such balance sheet, except that for the purposes of calculating the
Estimated  Working Capital the estimated amount of the payment by Sellers to the
Company  Employees  described in Section  1.4(d)(ii)(A)  below  ($2,390,000)  is
treated as if it had occurred on December 31, 2002.

     (c) Within five business days after the  determination of the Final Balance
Sheet (as hereinafter defined) in accordance with Section 1.4 of this Agreement,
(i) if the amount of the December 31 Working  Capital  calculated  in accordance
with Section 1.4 is less than the Estimated Working Capital,  then Sellers shall
pay to Buyer an amount equal to the  difference  between the  Estimated  Working
Capital and the December 31 Working  Capital plus interest or (ii) if the amount
of the December 31 Working Capital  calculated in accordance with Section 1.4 is
greater than the Estimated Working Capital, Buyer shall pay to Sellers an amount
equal  to the  difference  between  the  December  31  Working  Capital  and the
Estimated Working Capital, plus interest. Any interest on such payments shall be
calculated  using the prime rate of interest (as  published in the "Money Rates"
table of the  Eastern  U.S.  Edition of The Wall  Street  Journal on the Closing
Date) and shall begin on the Closing  Date (as  hereinafter  defined) and end on
the date of any such payment.

     (d) All payments required under this Section 1.2 shall be made in cash by
wire transfer of immediately available federal funds to such bank account(s) as
shall be designated in writing by the recipient at least three business days
prior to the Closing or promptly upon the determination of the Final Balance
Sheet, as the case may be. The net amount of all payments received by Sellers
under this Section 1.2 is referred to in this Agreement as the "Purchase Price."

     Section 1.3 Target Working Capital. "Target Working Capital" shall equal
$259,548,000, which represents the book value of those categories of current
assets of the Companies listed on Schedule 1.3 (the "Current Assets") less the
book value of those categories

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of current  liabilities  of the  Companies  listed on Schedule 1.3 (the "Current
Liabilities"),  in each case as reflected on the audited  combined  consolidated
balance  sheet of the Companies as of December 31, 2001 (the  "Year-End  Balance
Sheet").

     Section 1.4    Adjustment of Purchase Price.

     (a) For purposes of this Agreement, the "December 31 Working Capital" shall
mean the book value of the Current Assets less the book value of the Current
Liabilities as reflected on the Final Balance Sheet, except that for the
purposes of calculating the December 31 Working Capital the payment by Sellers
to the Company Employees described in Section 1.4(d)(ii)(A) below shall be
treated as if it had occurred on December 31, 2002. December 31 Working Capital
shall not include deferred directory costs, deferred revenue, any asset or
liability related to Taxes, the payroll liabilities described in Section
1.4(d)(ii)(A) or any intercompany accounts settled pursuant to Section 5.22.

     (b) Promptly following the Closing, Sellers shall prepare a combined
consolidated balance sheet of the Companies as of the close of business on
December 31, 2002 (the "Preliminary Balance Sheet"), in accordance with the
Accounting Principles. "Accounting Principles" means generally accepted
accounting principles ("GAAP") on a basis consistent with the Year-End Balance
Sheet and using the same policies and procedures as were used to prepare the
Year-End Balance Sheet. Sellers shall engage Ernst & Young (the "Sellers'
Auditor") to conduct an audit of the Preliminary Balance Sheet. Sellers and
Buyer shall use all commercially reasonable efforts, including Buyer making
available all necessary Company Employees to sign customary representation
letters required by Sellers' Auditor, to enable Sellers to deliver to Buyer an
audited Preliminary Balance Sheet on or prior to February 3, 2003, together with
the opinion of the Sellers' Auditor thereon stating that the audit has been
conducted in accordance with the Accounting Principles. Representatives of Buyer
shall have the opportunity (i) to receive, prior to delivery of the Preliminary
Balance Sheet, reasonably frequent updates from Sellers and Sellers' Auditor
concerning the audit process and results and any adjustments to the December 31,
2002 financial statements of the Companies proposed by the Sellers' Auditor
prior to such adjustments being made, (ii) to examine the work papers, schedules
and other documents prepared by Sellers in connection with the preparation of
the Preliminary Balance Sheet, and (iii) to otherwise participate in the audit
process. Sellers shall use all commercially reasonable efforts to cause the
Sellers' Auditor to permit Buyer and its accounting firm (the "Buyer's Auditor")
to examine the Sellers' Auditor's work papers used in connection with its audit
of the Preliminary Balance Sheet. Buyer shall be responsible for the fees and
expenses of the Buyer Auditor, and Sellers shall be responsible for the fees and
expenses of the Sellers' Auditor.

     (c) If Buyer objects to the Preliminary Balance Sheet, Buyer shall deliver
to Sellers a written notice of objection (an "Objection Notice") within thirty
(30) days following the delivery thereof. If Buyer has no objection to the
Preliminary Balance Sheet, Buyer shall promptly deliver to Sellers a written
notice of acceptance (an "Acceptance Notice"). The Preliminary Balance Sheet
shall be final and binding on the parties if an Acceptance Notice is delivered
or if no Objection Notice is delivered to Sellers within such 30-day period. Any
payment or portion of any payment required under Section 1.2 not subject to the
Objection Notice shall be paid within

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five business days following the delivery of the Objection Notice. Any Objection
Notice shall specify in reasonable  detail the disputed items on the Preliminary
Balance  Sheet  and  shall  describe  in  reasonable  detail  the  basis for the
objection and all  information  in the possession of Buyer which forms the basis
of the objection,  as well as the amount in dispute.  If an Objection  Notice is
given,  the parties shall consult with each other with respect to the objection.
If the parties are unable to reach  agreement  within  thirty (30) days after an
Objection Notice has been given, any unresolved disputed items shall be promptly
referred  to KPMG;  provided,  however,  that if KPMG  declines  to accept  such
appointment  then the  parties  shall  mutually  agree upon  another  nationally
recognized  independent  accounting firm that has not provided material services
to either party during the previous two years (the "Unrelated Accounting Firm").
The Unrelated  Accounting  Firm shall be directed to resolve  disputed issues in
accordance  with the terms of this  Agreement and render a written report on the
unresolved  disputed  issues with respect to the  Preliminary  Balance  Sheet as
promptly as practicable and to resolve only those issues of dispute set forth in
the Objection Notice. The resolution of the dispute by the Unrelated  Accounting
Firm shall be final and  binding on the  parties.  The fees and  expenses of the
Unrelated  Accounting  Firm shall be borne equally by Sellers,  on the one hand,
and  Buyer,  on the  other  hand.  The  Preliminary  Balance  Sheet  as  finally
determined  pursuant to this Section  1.4(c) is referred to in this Agreement as
the "Final Balance Sheet".

     (d) Notwithstanding any other Section of this Agreement (including Sections
2.3(a) and 5.1), Buyer and Sellers agree that after (but not including) December
31, 2002 (i) Sellers and their Affiliates will not distribute or transfer (by
cash sweep or otherwise) any cash out of the Companies and (ii) none of Sellers,
the Companies or their respective Affiliates will pay any accounts payable of
the Companies, except that Sellers will pay the Company Employees (A) on or
about January 3, 2003, for payroll, vacation, salesperson commissions and
related withholdings accrued through the last payroll date prior to December 31,
2002 (the "Cut-off Date") and (B) on or about January 10, 2003, for payroll,
vacation, salesperson commissions and related withholdings accrued from the
Cut-off Date through January 3, 2003 (any portion attributable to the period
from and including January 1, 2003 through January 3, 2003, excluding amounts
paid with respect to floating holidays under Sellers' vacation plans, being
herein referred to as the "2003 Employee Payment"). Buyer shall reimburse
Sellers in full for the amount of the 2003 Employee Payment, which payment shall
be due within five (5) days of the delivery to Buyer by Sellers of a notice of
the amount of the 2003 Employee Payment accompanied by wire transfer
instructions. The cash and accounts payable accrued by the Companies during the
period from January 1, 2003, through the Closing will be transferred to Buyer
with the Companies at Closing and will not be taken into account in calculating
the post-closing Purchase Price adjustment contemplated by Section 1.2.

     Section 1.5 Closing. The Closing of the transactions contemplated by this
Agreement shall take place on the latter to occur of (a) January 3, 2003 and (b)
the fifth business day following the satisfaction or waiver of all of the
conditions to Closing set forth in Article VI of this Agreement that are capable
of being satisfied prior to the Closing Date, at 10:00 a.m., local time, at the
offices of Jones, Day, Reavis & Pogue, 222 East 41st Street, New York, NY 10017,
or on such other date and at such other time or place as the parties may agree.
However, if the prior sentence would require the Closing to occur prior to

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January 30, 2003, Buyer may elect to defer the Closing to a date on or prior to
January 30, 2003. The date of the Closing is sometimes referred to in this
Agreement as the "Closing Date." The Closing will be effective as of the close
of business on the Closing Date."

     2. Tradenames and Trademarks. It is expressly agreed that Buyer is not
purchasing, acquiring or otherwise obtaining any right, title or interest in the
name "Centel" or any "Centel" tradenames, trademarks, identifying logos or
service marks related thereto or employing any part or variation of any of the
foregoing or any confusingly similar tradename, trademark or logo (collectively,
the "Centel Tradenames and Logos") pursuant to the Stock Purchase Agreement.
Buyer agrees that neither it nor any of its Affiliates shall make any use of the
Centel Tradenames and Logos from and after the Closing Date; provided, however;
that the name "CenDon" shall not be deemed to be one of the Centel Tradenames
and Logos. Prior to the Closing, Sellers will cause the corporate names of CDC
and SPA to be amended to remove any reference to the name "Centel" or "Sprint"
respectively, or any other name that suggests CDC or SPA is a subsidiary of or
affiliated with Sprint. As soon as practicable following the Closing, Buyer will
cause each of SPA and CDC to amend their certificates of authority to conduct
business in every foreign jurisdiction where they are currently qualified (as
listed on Schedule 3.1 of the Stock Purchase Agreement) to remove any reference
to the name "Sprint" or "Centel" or any other name that suggests SPA or CDC is a
subsidiary of or affiliated with Sprint. Buyer's and Seller's obligations under
Section 3 of this Supplemental Agreement are in addition to their respective
obligations under the first two sentences of Section 2.1 of the Stock Purchase
Agreement.

     3. Loan Termination. Sellers represent and warrant to Buyer that the letter
dated December 9, 2002 from SPA and CDC addressed to Deutsche Bank AG, New York
Branch, as Administrative Agent (the "Loan Termination Letter") has (a) caused
the Companies to be released as guarantor of all financing of Sellers and their
Affiliates (other than the Companies) and (b) has caused the termination of the
agreements listed on Schedule 3.7 of the Stock Purchase Agreement (except for
any provisions thereof which expressly survive such termination). Sellers also
represent and warrant to Buyer that the two commitments referenced in the Loan
Termination Letter are the only two credit facilities under which any of the
Companies are guarantors or parties and that no amounts have been drawn or are
outstanding under either such commitment.

     4. Telecommunications Service Agreements. Sprint, Centel LLC and Buyer
acknowledge that the telecommunications service agreements contemplated by
Section 16.2 of the Directory Services License Agreement will not be executed
simultaneously with or prior to the effectiveness of the Directory Services
License Agreement. Sprint, Centel LLC and Buyer will use their reasonable best
efforts to cause Publisher and the applicable Sprint Entities (each as defined
in the Directory Services License Agreement) to execute telecommunications
services agreements (on the terms set forth in Section 16.2 of the Directory
Services License Agreement and otherwise in forms mutually agreed to between the
Parties) as soon as practicable following the effectiveness of the Directory
Services License Agreement




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     5. Miscellaneous.

     5.1. Other  Provisions.  The provisions of Sections 10.3, 10.4, 10.5, 10.6,
10.8, 10.9, 10.10, 10.11, 10.12, 10.13 and 10.16 of the Stock Purchase Agreement
are incorporated herein by this reference.

     5.2. No Other Amendment.  Except as expressly provided in this Supplemental
Agreement,  the Stock  Purchase  Agreement  is and shall  continue to be in full
force and effect.

     IN WITNESS WHEREOF, the parties to this Supplemental Agreement have caused
this Supplemental Agreement to be executed as of the date first above written.

                         SPRINT CORPORATION
                         By: /s/ Charles Wunsch
                         Name:  Charles Wunsch
                         Title:  Assistant Vice President


                         CENTEL DIRECTORIES LLC
                         By: /s/ Charles Wunsch
                         Name:  Charles Wunsch
                         Title:  Vice President


                         R.H. DONNELLEY CORPORATION
                         By: /s/ Robert J. Bush
                         Name:  Robert J. Bush
                         Title:  Vice President





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Exhibit A to this agreement, consisting of a schedule of current assets and
current liabilities, has been omitted for purposes of this filing, but will be
furnished supplementally to the Securities and Exchange Commission upon request.