No. 77-1651. Submitted January 12, 1978. Decided March 8, 1978. Norman R. Buchsbaum, James E. Carbine and Carl S. Silverman (argued) Baltimore, Md., Larry A. Hanson, St. Paul, Minn., on brief for appellant. Richard A. Lockridge, St. Paul, Minn., for State, argued, for appellees; Linda Auerbach, N.L.R.B., Washington, D.C., for Labor Board. Appeal from the United States District Court for the District of Minnesota. Before BRIGHT and HENLEY, Circuit Judges, and Talbot Smith, Senior District Judge. The