No. 91-6260. Argued October 2, 1992. Decided December 2, 1992. Lynn Agee (briefed), Mark Brooks, United Paperworkers Intern. Union, Nashville, Tenn., Peter M. Fox (argued), Thomas J. Kircher, Kircher, Robinson, Cook, Newman Welch, Cincinnati, Ohio, for petitioner. Aileen A. Armstrong, Deputy Associate Gen. Counsel, Peter Winkler, Joseph Oertel (argued and briefed), N.L.R.B., Office of the Gen. Counsel, Washington, D.C., Linda Rabin, N.L.R.B., Region 7, Detroit, Mich., for respondent. Carl E. VerBeek