No. 18354. February 11, 1969. Robert S. Hillman, Baltimore, Md., Shawe Rosenthal, Baltimore, Md., Earle K. Shawe, William J. Rosenthal, Lawrence S. Wescott, Baltimore, Md., on brief, for petitioners. Leonard M. Wagman, N.L.R.B., Washington, D.C., Arnold Ordman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Asst. General Counsel, Lawrence M. Joseph, Richard Adelman, Attorneys, N.L.R.B., Washington, D.C., on brief, for respondent. Howard S. Simonoff, Camden