No. 86-5308. Argued March 9, 1987. Decided August 13, 1987. Rehearing and Rehearing En Banc Denied October 15, 1987. Elliott Moore, Deputy Associate General Counsel, N.L.R.B., Washington, D.C., Susan L. Williams (argued), William R. Stewart, Emil C. Farkas, Director, Region 9, N.L.R.B., Cincinnati, Ohio, for petitioner. Arthur R. Donovan, Larry R. Downs, Kahn, Dees, Donovan, Kahn, Evansville, Ind., William Michael Schiff, Evansville, Ind., J. Alan Lips (argued), Taft, Stettinius Hollister, Cincinnati