No. 19238. Argued September 21, 1965. Decided November 4, 1965. Mr. Ronald A. Jacks, Washington, D.C., for petitioner. Mr. Michael R. Brown, Attorney, National Labor Relations Board, of the bar of the Supreme Judicial Court of Massachusetts, pro hac vice, by special leave of court, with whom Messrs. Arnold Ordman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Asst. General Counsel, and Solomon I. Hirsh, Attorney, National Labor Relations Board, were on the