Nos. 89-3395, 89-3688. Argued May 16, 1990. Decided November 26, 1990. Rehearing and Rehearing En Banc Denied January 7, 1991. Carol L. VanHal, Vedder, Price, Kaufman Kammholz, Chicago, Ill., David W. Miller, Baker Daniels, Indianapolis, Ind., Vance D. Miller, Lashly, Baer Hamel, St. Louis, Mo., for petitioner, cross-respondent. Aileen A. Armstrong, Howard E. Perlstein, Joseph H. Bornong, N.L.R.B., Appellate Court, Enforcement Litigation, Washington, D.C., William T. Little, N.L.R.B., Indianapolis