No. 17180. Argued December 5, 1968. Decided April 25, 1969. Fred R. Kimmel, N.L.R.B., Washington, D.C. (Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Nancy M. Sherman, Daniel H. Jacoby, Attys., N.L.R.B., on the brief), for petitioner. Earl S. Aronson, Newark, N.J. (Thomas E. Durkin, Jr., Newark, N.J., on the brief), for respondent. Vincent J. Apruzzese, Apruzzese McDermott, Newark, N.J., for intervenors. Before HASTIE, Chief Judge