No. 82-1055. Argued June 14, 1983. Decided December 2, 1983. Rehearing and Rehearing En Banc Denied January 12, 1984. Elliott Moore, Deputy Associate Gen. Counsel, N.L.R.B., Washington, D.C., Paul Spielberg, argued, for petitioner. Bruce W. Martin, Craig A. Miller, Miller, Johnson, Snell Cummiske, Kalamazoo, Mich., Barry Smith, argued, Paul A. Williams, Reamon, Williams, Klukowski, Wood Drew, Grand Rapids, Mich., for respondent. Steven C. Kahn, Pepper, Hamilton Scheetz, Washington, D.C., for amicus