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PROSPECTUS SUPPLEMENT                          This Prospectus Supplement,
FOR THE PERIOD ENDING                          filed pursuant to Rule 424(b)(3),
FEBRUARY 28, 1998 TO                           relates to Registration Statement
PROSPECTUS DATED                               No. 33-43136-02 and the
OCTOBER 8, 1991                                Prospectus dated October 8, 1991


                       SECURITIES AND EXCHANGE COMMISSION
                             450 Fifth Street, N.W.
                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


        Date of Report (Date of earliest event reported): March 16, 1998


                           DISCOVER CARD TRUST 1991 D
                           --------------------------
             (Exact name of registrant as specified in its charter)


Delaware                           0-19734                      Not Applicable
- --------                           -------                      --------------
(State of                         (Commission                   (IRS Employer
organization)                     File Number)               Identification No.)


c/o Discover Receivables Financing Group, Inc.
12 Read's Way
New Castle, Delaware                           19720    
- ----------------------------------------------------------
(Address of principal executive offices)     (Zip Code)

Registrant's telephone number, including area code: (302) 323-7826


                                 Not Applicable
                   -------------------------------------------
          (Former name or former address, if changed since last report)


                                  Page 1 of 15
                         Index to Exhibits is on page 4

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Item 5. Other Events

On March 16, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the Due Period of February 1998, which is attached as Exhibit 21
hereto.

Item 7.  Financial Statements and Exhibits

(c) Exhibits

Exhibit No. Description

21          Monthly Certificateholders' Statement for Discover Card Trust 1991 D
            related to the Due Period ending February 28, 1998.


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                                   SIGNATURES

    Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                                        DISCOVER CARD TRUST 1991 D
                                        (Registrant)

                                        By: DISCOVER RECEIVABLES FINANCING
                                        GROUP, INC.
                                        as originator of the Trust


                                        By: /s/ Richard W. York
                                            ------------------------------------
                                            Richard W. York
                                            Vice President


Date: March 16, 1998

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                                  EXHIBIT INDEX

Exhibit No. Description

21          Monthly Certificateholders' Statement for Discover Card Trust 1991 D
            related to the Due Period ending February 28, 1998.

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