No. 15502. Argued September 22, 1960. Decided December 15, 1960. Bernard Dunau, Washington, D.C., for petitioners. Duane B. Beeson, Atty., N.L.R.B., of the bar of the Supreme Court of California, Washington, D.C., pro hac vice, by special leave of court, with whom Dominick L. Manoli, Associate Gen. Counsel, N.L.R.B., Marcel Mallet-Prevost, Asst. Gen. Counsel, N.L.R.B., and Richard J. Scupi, Atty., N.L.R.B., Washington, D.C., were on the brief, for respondent. Thomas J. McDermott, Associate Gen. Counsel