No. 90-2800. Submitted May 16, 1991. Decided October 4, 1991. Ross A. Friedman, St. Louis, Mo., for petitioner. Joseph A. Oertel, argued (Jerry M. Hunter, D. Randall Frye and Aileen A. Armstrong on the brief), Washington, D.C., for respondent. Petition for review from the National Labor Relations Board. Before JOHN R. GIBSON, Circuit Judge, and FLOYD R. GIBSON and ROSS, Senior Circuit Judges. JOHN R. GIBSON, Circuit Judge. United Exposition Service Company, Inc., appeals from a decision and order