Document:

<PAGE>
                                                                     EXHIBIT 4.2

                                AMENDMENT TO THE
                            INFOUSA, INC. 401(k) PLAN

         AMENDMENT made by infoUSA, Inc., a corporation organized and existing
under the laws of the State of Delaware (hereinafter referred to as the
"Company").

                                   WITNESSETH:

         WHEREAS, the Company previously adopted and maintains the infoUSA, Inc.
401(k) Plan (the "Plan"); and

         WHEREAS, pursuant to Section 10.1 of the Plan, the Company may amend
the Plan at any time; and

         WHEREAS, the Company desires to amend the Plan in certain respects;

         NOW, THEREFORE, BE IT RESOLVED WHEREAS, that effective December 29,
2000, the Plan is hereby amended as follows:

I.       Plan Year Amendments

         A.    Section 1.01(f) of the Adoption Agreement is amended as follows:

               (f)    PLAN YEAR END (month/day):  December 30

         B.    Section 1.03(b) of the Adoption Agreement is amended by the
               addition of a new subsection 1.03(b)(5) as follows:

                      (5)    [X]  the first day of each calendar year and the
               first day of the fourth, seventh, and tenth months.

II.      Tax Year Amendments

         A.    Section 1.01 of the Adoption Agreement is amended to add a new
               section 1.01(h) as follows:

               (h)    APPLICABLE TAX YEAR:  The Tax Year in which the Plan Year
                      begins.

         B.    Section 1.01 of the Adoption Agreement is amended to add a new
               section 1.01(i) as follows:

               (I)    TAX YEAR:  The fiscal year of the Company which begins on
                      January 1 and ends on December 31.

                                       1
<PAGE>

III.     Contribution and Allocation Amendment:

         A.    Section 1.05(a) of the Adoption Agreement is amended as follows:

               1.05    CONTRIBUTIONS

                       (a)    [X]  EMPLOYER CONTRIBUTIONS

         B.    Section 1.05(a) of the Adoption Agreement is amended by the
               addition of a new subsection 1.05(a)(3) as follows:

                              (3)    [X]  SPECIFIED MINIMUM EMPLOYER
                                          CONTRIBUTION. The Employer, in its
                                          sole discretion, may contribute an
                                          amount, for any Plan Year, which it
                                          designates as a Specified Minimum
                                          Employer Contribution.

C.       Article IV of the Plan is amended by adding a new section 4.13 as
         follows:

         4.13    Specified Minimum Employer Contribution. Notwithstanding any
         provision of the Plan to the contrary, the following provisions shall
         govern the treatment of Specified Minimum Employer Contributions.

                 (a)    Frequency and Eligibility. For each Plan Year, the
         Employer shall make a discretionary Specified Minimum Employer
         Contribution on behalf of the group of Employees who are Employees and
         Plan Participants from the first day through the last day of the
         Applicable Tax Year (First Day Participants). The Specified Minimum
         Employer Contribution will be based on Compensation earned by the First
         Day Participants in the Applicable Tax Year. The Specified Minimum
         Employer Contribution for each Plan Year shall be in an amount
         determined by the Board of Directors by appropriate resolution on or
         before the last day of the Applicable Tax Year.

                 (b)    Allocation Method. Each First Day Participant's share
         shall be determined as follows:

                        (1) The Specified Minimum Employer Contribution shall
         be allocated during the Plan Year as Deferral Contributions described
         in section 1.05(b) of the Adoption Agreement and participating Matching
         Contributions described in section 1.05(c) of the Adoption Agreement,
         to the Account of each First Day Participant pursuant to sections 4.01
         and 4.03 of the Plan. Such Matching Contributions shall be made without
         regard to any last day requirement, or any other Year of Service or
         hour-of-service requirement.

                        (2) Second, if any of the Specified Minimum Employer
         Contribution remains after the allocation in section 4.13(b)(1), above,
         the remainder shall, to the extent allowable under Section 415 of the
         Internal Revenue Code, be allocated as an additional

                                       2
<PAGE>

         Matching Contribution on the last day of the Plan Year to each First
         Day Participant's Matching Contribution Account, as defined in
         section 5.1 of the Plan, in the ratio that such First Day Participant's
         Deferral Contributions during the Plan Year bears to the Deferral
         Contributions of all First Day Participants during the Plan Year.

         The Specified Minimum Employer Contributions allocated as an additional
         Matching Contribution shall be treated in the same manner as Matching
         Contributions for all purposes of the Plan.

                        (3) The Administrator shall reduce the proportionate
         allocation under section 4.13(b)(l) and (2) above, to Participants who
         are Highly Compensated Employees to the extent necessary to comply with
         the provisions of Section 401(a)(4) of the Internal Revenue Code and
         the regulations thereunder. Any such amount will be allocated and
         reallocated to the remaining Participants to the extent allowed under
         Section 415 of the Internal Revenue Code.

         Notwithstanding any other provision of the Plan to the contrary, any
         allocation of Deferral Contributions to a First Day Participant's
         Deferral Contribution Account shall be made under section 4.01 or this
         section, as appropriate, but not both sections. Similarly, any
         allocation of Participating Matching Contributions to a First Day
         Participant's Matching Contribution Account shall be made under either
         section 4.03 or this section of the Plan, as appropriate, but not both
         items.

                 (c)    Timing, Medium and Posting. The Employer shall make the
         Specified Minimum Employer Contribution in cash, in one or more
         installments without interest, at any time during the Plan Year, and
         for purposes of deducting such Contribution, not later than the
         Employer's federal tax filing date, including extensions, for its Tax
         Year that ends within such Plan Year. The Trustee shall post such
         amount to each First Day Participant's Deferral Contribution Account,
         or Matching Contribution Account once the allocations under (1) through
         (3), above, are determined.

         The Specified Minimum Employer Contribution shall be held in a suspense
         account until posted. Such suspense account shall not participate in
         the allocation of investment gains, losses, income and deductions of
         the trust as a whole, but shall be invested separately. All gains,
         losses, income and deductions attributable to such suspense account
         shall be applied to reduce Plan fees and expenses. In no event will
         amounts remain in the suspense account after the end of the Plan Year.

                 (d)    Deduction Limitation. In no event shall the Specified
         Minimum Employer Contribution, when aggregated with other Employer and
         Participant contributions for the Employer's Tax Year that ends within
         such Plan Year, exceed the amount deductible by the Employer for
         federal income tax purposes for such Tax Year.

                                       3
<PAGE>

IN WITNESS WHEREOF, this Amendment is adopted this 26th day of December 2001.

/s/ Stormy L. Dean
-------------------------
InfoUSA, Inc.

Attest:

/s/ Fred Vakili
-------------------------
Secretary                                                              (Seal)

                                       4<PAGE>
                                                                     EXHIBIT 4.3

                    AMENDMENT TO THE INFOUSA INC. 401(k) PLAN

         Effective February 1, 2001, the infoUSA Inc. 401(k) Plan (the "Plan"),
Adoption Agreement section .09, is hereby amended as follows:

         "Participant Loans

         Participant loans (check (a) or (b)):

         (a)     X     will be allowed in accordance with Section 7.09, subject
               -----   to a $1,000 minimum amount and will be granted (check (1)
                       or (2)):

               (1)       X    for any purpose.
                       -----

               (2)            for hardship withdrawal (as defined in
                       -----  Section 7.10) purposes only.

         (b)         will not be allowed."
               -----

         The foregoing amendment was adopted pursuant to resolutions taken by
the Board of Directors of infoUSA Inc.<PAGE>

                                                                 EXHIBIT 10.3

                                 AMENDMENT NO. 1

                                       TO

                          SECURITIES PURCHASE AGREEMENT

                                      AMONG

                            SUIZA FOODS CORPORATION,

                        SUIZA DAIRY GROUP HOLDINGS, INC.,

                            SUIZA DAIRY GROUP, L.P.,

                              SUIZA SOUTHEAST, LLC,

                         DAIRY FARMERS OF AMERICA, INC.,

                                       AND

                             MID-AM CAPITAL, L.L.C.

                         DATED AS OF SEPTEMBER 19, 2001

<PAGE>

                                 AMENDMENT NO. 1
                                       TO
                          SECURITIES PURCHASE AGREEMENT

         This Amendment No. 1 to Securities Purchase Agreement ("AMENDMENT") is
made as of September 19, 2001, by and among Suiza Foods Corporation, a Delaware
corporation ("SUIZA"), Suiza Dairy Group Holdings, Inc., a Nevada corporation
("HOLDINGS"), Suiza Dairy Group, L.P., a Delaware limited partnership ("SDG"),
Suiza Southeast, LLC, a Delaware limited liability company ("SUIZA SOUTHEAST"),
Dairy Farmers of America, Inc., a Kansas cooperative marketing association
("DFA"), and Mid-Am Capital, L.L.C., Delaware limited liability company
("MID-AM").

         WHEREAS, Suiza, Holdings, SDG, Suiza Southeast, DFA and Mid-Am are
parties to that certain Securities Purchase Agreement dated April 4, 2001
("AGREEMENT"), pursuant to which Holdings agreed to purchase from DFA and
Mid-Am, and DFA and Mid-Am agreed to sell to Holdings, all the limited partner
interests in SDG held by each of them;

         WHEREAS, Suiza, Holdings, SDG, Suiza Southeast, DFA and Mid-Am desire
to amend the Agreement on the terms set forth herein; and

         NOW, THEREFORE, in consideration of the premises and the mutual
covenants, and in reliance on the representations and warranties, herein
contained, the parties hereby agree as follows:

         1. Amendment to Section 2.2(a). Section 2.2(a) is hereby amended by
deleting Section 2.2(a) as it appears in the Agreement in its entirety and
inserting in its place the following revised Section 2.2(a):

            "(a) In exchange for the SDG Common Interests and the SDG Preferred
            Interests, Holdings will (i) cause SDG or Dean Foods, as applicable,
            to transfer, sell and convey the Dairy Assets and the Dairy
            Liabilities to DFA, (ii) pay, or cause SDG to pay, an amount equal
            to $166 million in cash to DFA and Mid-Am, subject to adjustment as
            set forth below (the "CASH CONSIDERATION"), in the relative amounts
            designated by the DFA Companies at least 3 days prior to Closing,
            (iii) deliver a subordinated promissory note executed by Suiza in
            the principal amount of $50,000,000 to DFA, in substantially the
            form of Exhibit C attached hereto (the "Note"), and (iv) deliver a
            First Amendment to Milk Supply Agreement executed by Suiza, in
            substantially the form of Exhibit E attached hereto (the "SUPPLY
            AMENDMENT"). Items (i), (ii), (iii) and (iv) are collectively
            referred to as the "PURCHASE PRICE". SDG will not transfer, sell or
            convey the Excluded Assets to DFA and DFA will not assume and shall
            not be liable or responsible for any Excluded Liabilities. The Cash
            Consideration payable to DFA at Closing shall be (A) increased for
            DFA's and Mid-Am's pro rata share of the reported earnings of SDG
            from and including January 1, 2001 through the day immediately
            preceding the Closing Date, (B) decreased by (I) $2,535,000, plus
            (II) the amount of any distributions (including any distributions to
            be paid after Closing related to the period prior to the Closing
            Date) paid to DFA and Mid-Am

                                       36
<PAGE>

            of cash or other property and the amount of any deemed distributions
            (for stock option exercises) deemed paid to DFA and Mid-Am under the
            Limited Partnership Agreement, in the case of such distributions,
            from and including January 1, 2001 and through the day immediately
            preceding the Closing Date, and (C) increased or decreased, as
            applicable, to the extent the Closing Date Working Capital is less
            than or greater than Stated Working Capital (collectively, the "CASH
            ADJUSTMENT")."

         2. Amendment to Section 2.4(d). Section 2.4(d) is hereby amended by
replacing section 2.4(d) as it appears in the Agreement with the following new
section 2.4(d), and renumbering the existing 2.4(d) in the Agreement as new
section 2.4(e), as follows:

            "(d) Suiza and DFA will execute and deliver the Supply Amendment,
            substantially in the form attached hereto as Exhibit E.

            (e) Suiza, Holdings, SDG, Suiza Southeast, Dean Foods and/or one or
            more of its subsidiaries, DFA and Mid-Am will execute and deliver
            such other documents and agreements required under Sections 7 and 8,
            as applicable."

         3. Amendment to Section 4. Section 4 is hereby amended by adding the
following new section 4.3:

            "4.3 MILK SUPPLY AGREEMENTS. Except as set forth on Schedule 4.3 and
            except for milk supply agreements with DFA, neither Velda, Coburg
            Dairy, Inc., H. Meyer Dairy Company, Cream-O-Weber Dairy, Inc., nor
            the fluid milk facility of Barber Dairies, Inc., located in
            Birmingham, Alabama is a party to a supply agreement which has (a)
            term in excess of one (1) year and which does not expire on or
            before December 31, 2001 or (b) a right of first offer or right of
            first refusal with respect to the supply of raw milk."

         4. Amendment to Section 6. Section 6 is hereby amended by adding the
following new Section 6.13:

            "6.13 DAIRY LIABILITIES. In no event shall any milk supply
            agreement, other than those listed on Schedule 4.3, which has (a) a
            term in excess of one (1) year and which does not expire on or
            before December 31, 2001 or (b) a right of first offer or right of
            first refusal with respect to the supply of raw milk, constitute a
            Dairy Liability."

         5. Amendment to Section 8.1. Section 8.1 is hereby amended by adding
the following sentence to the end of such section

            "Notwithstanding the foregoing, the failure of the representation
            and warranty contained in Section 4.3 to be accurate as of the date
            hereof or on the Closing Date shall not be the basis for or cause
            the condition set forth in this Section 8.1 to fail to be satisfied.
            If the representation and warranty contained in Section 4.3 fails to
            be accurate on the date hereof or on the Closing Date, DFA (assuming
            the other conditions precedent to DFA's obligation to Close have
            either been satisfied

                                       37
<PAGE>

            or waived as of the Closing Date) will not be permitted to terminate
            this Agreement and will not be released from its obligations to
            Close the transactions contemplated hereby. Nothing in this Section
            8.1 shall limit DFA's right to be indemnified in respect of a breach
            of the representation and warranty contained in Section 4.3, as
            provided in Section 9 of the Agreement."

         6. Amendment to Section 9.1. Section 9.1 is hereby amended by deleting
third sentence of Section 9.1 as it appears in the Agreement in its entirety and
inserting in its place the following revised third sentence of Section 9.1:

            "Except as otherwise provided in this Section 9.1, all
            representations and warranties in this Agreement and the Bill of
            Sale and any other certificate or document delivered pursuant to
            this Agreement or the Bill of Sale will terminate eighteen months
            after the Closing; provided, however, that (a) the representations
            and warranties set forth in Section 4.3 of this Agreement will
            survive for a period of five years after the Closing, (b) the
            representations and warranties set forth in Sections 4.1(c)(i),
            4.1(c)(iii) and 4.1(c)(iv) of the Bill of Sale will survive until
            the expiration of the applicable statute of limitations for any such
            violation, breach or other matter that is the subject of such
            representations and warranties, (c) if any breach of the
            representations and warranties set forth herein, or in Sections 3.1,
            4.1, 4.7, 4.9, 4.10, 4.11 or 4.15 of the Bill of Sale is based on a
            violation of any Legal Requirement, then such representations and
            warranties and any claim for indemnification applicable to such a
            violation shall survive for the longer of eighteen months from the
            Closing Date and the applicable statute of limitation with respect
            thereto; and (d) with respect to the representations and warranties
            set forth in Sections 3.2, 4.4 and 4.5(b) of the Bill of Sale, such
            representations and warranties and any claim for indemnification
            with respect thereto shall survive indefinitely."

         7. Amendment to Section 9.4(e). Section 9.4(e) is hereby amended by
deleting Section 9.4(e) as it appears in the Agreement in its entirety and
inserting in its place the following revised Section 9.4(e):

            "(e) Notwithstanding the foregoing, the limitations set forth in
            Section 9.4(b), (c) and (d) will not apply to Damages arising from
            or in connection with a breach or alleged breach of (i) the
            representations and warranties of DFA set forth in Section 3.2 of
            the Bill of Sale, (ii) the representations and warranties of Suiza,
            Holdings and SDG set forth in Section 4.3 of this Agreement, (iii)
            the representations and warranties of Suiza and SDG set forth in
            Section 4.4 and 4.5(b) of the Bill of Sale, (iv) the covenants and
            agreements concerning the Dairy Liabilities or the Excluded
            Liabilities, or (v) the covenants and agreements set forth in
            Section 6.11(d)."

         8. Amendment to Exhibit C. Exhibit C to the Agreement as hereby amended
by deleting Exhibit C as it appears as an attachment to the Agreement in its
entirety and inserting in its place the revised Exhibit C attached hereto.

                                       38
<PAGE>

         9. Miscellaneous.

                  (a) All capitalized terms not otherwise defined herein shall
         have the meanings ascribed to such terms in the Agreement.

                  (b) This Amendment may be executed in two or more
         counterparts, each of which shall be deemed an original, but all of
         which together shall constitute one and the same instrument.

                  (c) This Amendment is intended to amend the Agreement. Except
         as specifically set forth herein, all other terms and conditions of the
         Agreement shall remain in full force and effect without modification.

                            [SIGNATURE PAGES FOLLOW]

<PAGE>

         IN WITNESS WHEREOF, the parties have executed and delivered this
Amendment as of the date first written above.

                                SUIZA FOODS CORPORATION

                                By:  /s/ MICHELLE P. GOOLSBY
                                   ---------------------------------------------
                                     Name:  Michelle P. Goolsby
                                          --------------------------------------
                                     Title:    Executive Vice President
                                             -----------------------------------
                                               & General Counsel
                                             -----------------------------------

                                SUIZA DAIRY GROUP HOLDINGS, INC.

                                By:  /s/ MICHELLE P. GOOLSBY
                                   ---------------------------------------------
                                     Name:  Michelle P. Goolsby
                                          --------------------------------------
                                     Title:    Vice President
                                           -------------------------------------

                                SUIZA DAIRY GROUP, L.P.

                                By: SUIZA MANAGEMENT CORPORATION,
                                the sole general partner

                                By:  /s/ MICHELLE P. GOOLSBY
                                   ---------------------------------------------
                                     Name:  Michelle P. Goolsby
                                          --------------------------------------
                                     Title:    Executive Vice President
                                             -----------------------------------
                                               & General Counsel
                                             -----------------------------------

                                SUIZA SOUTHEAST, LLC

                                By:  /s/ MICHELLE P. GOOLSBY
                                   ---------------------------------------------
                                     Name:  Michelle P. Goolsby
                                          --------------------------------------
                                     Title:    Vice President
                                           -------------------------------------

                                DAIRY FARMERS OF AMERICA, INC.

                                By:  /s/ GARY E. HANMAN
                                   ---------------------------------------------
                                     Name:  Gary E. Hanman
                                          --------------------------------------
                                     Title: President & Chief Executive Officer
                                           -------------------------------------

<PAGE>

                                MID-AM CAPITAL, L.L.C.

                                By:  /s/ GERALD L. BOS
                                   ---------------------------------------------
                                     Name:  Gerald L. Bos
                                          --------------------------------------
                                     Title:    CEO & Treasurer
                                           -------------------------------------

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00031-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00031-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00031-of-00352.parquet"}]]