1 EXHIBIT 23.1 Consent of Independent Certified Public Accountants The Source Information Management Company St. Louis, Missouri We hereby consent to the incorporation by reference in the Registration Statement Form S-8 of our reports dated April 12, 2001, relating to the consolidated financial statements and schedule of The Source Information Management Company appearing in the Company's Annual Report on Form 10-K as of and for the year ended January 31, 2001. /s/ BDO Seidman, LLP St. Louis, Missouri June 27, 2001