Nos. 22671, 22804. Argued September 23, 1969. Decided March 20, 1970. Mr. Herbert Fishgold, 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, and Marcel Mallet-Prevost, Assistant General Counsel, National Labor Relations Board, were on the brief, for petitioners in No. 22,804 and respondent in No. 22,671. Mr. Russ R. Mueller