Nos. 20086, 20235. Argued December 19, 1966. Decided February 23, 1967. Mr. Michael Gottesman, Washington, D.C., with whom Mr. Elliot Bredhoff, Washington, D.C., was on the brief, for petitioner in No. 20086. Mr. Eugene B. Granof, Washington, D.C., Attorney, National Labor Relations Board, of the bar of the Court of Appeals of New York, 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